Am 3. August 2019 09:25:29 MESZ schrieb DL via Exim-users
>2019-07-29 06:40:30 cwd=/home/nordic/public_html 4 args:
>/usr/sbin/sendmail -t -i -p125

Just btw., i would not allow any PHP / LAMP stack in a typical (especially 
shared) hosting-environment to use the "old" console based access to the 
"sendmail" emulator/binary and would primwrily force to use SMTP with SMTP-Auth 
instead. 

This has several pros, because the attacker can't use shell escapes and can't 
create/form emails out of that Your SMTP "allows" and a lot of typical bugs or 
"spam filter problems" (false positives at recipient side) die to bogus / 
"crappy" declared emails  could be prevented this way.

And by changing the SMTP users password, You can easily block further usage by 
the existing relaying / hacked script or (depending from the hack vector) a 
hacker need to steal the PW from the code or db to use the mailer/relay.

For the application / user: using real SMTP provides more control in case of 
any errors / failures as woking rate-limiting (i.e. in a typical form-mailer). 
From my experience, any (at least half baken) LAMP/PHP scripts / apps with 
"email functionality" provide the usage of real SMT today, because many hosters 
- for security reasons - provide only external SMTPs.

hth a bit in any way.

just my .02$,


niels.

-- 
Niels Dettenbach
Syndicat IT & Internet
https://www.syndicat.com

-- 
## List details at https://lists.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/

Reply via email to