Re: Nessus scan of FreeBSD 5.2.1 shows old version of ssh

2004-07-19 Thread Fernando Gleiser
On Mon, 19 Jul 2004, Ray Seals wrote:

> I just ran a Nessus scan against one of my machines.  The scan triggered
> on a version of ssh older than 3.7.1.

It's a false positive. Nessus just checks the version number, it doesn't
try to exploit the vulnerability to find if the system is indeed
vulnerable.

The sshd version in FreeBSD is older, but it's patched and not
vulnerable.

Don't worry about it.

>
> I ran /usr/bin/ssh -v and found that I have version 3.6.1p1.  I'm



Fer
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Re: Nessus scan of FreeBSD 5.2.1 shows old version of ssh

2004-07-19 Thread Bill Moran
Ray Seals <[EMAIL PROTECTED]> wrote:

> I just ran a Nessus scan against one of my machines.  The scan triggered
> on a version of ssh older than 3.7.1.
> 
> I ran /usr/bin/ssh -v and found that I have version 3.6.1p1.  I'm
> looking for the best way to upgrade this.  Can I just install and run
> 'portupgrade' on SSH?  What are some of the "gotcha" points on doing
> this?

You're about the third person in as many months who's pointed out how
stupid Nessis.

The version in FreeBSD is NOT vulnerable, it's just that Nessis isn't
aware of all the various version numbers that have had this problem
patched.

If you want to silence Nessis, however, the other responder had some
good suggestions.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com
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RE: Nessus scan of FreeBSD 5.2.1 shows old version of ssh

2004-07-19 Thread Vince
Well if  you realy want the latest openssh install openssh from ports 
(portinstall openssh or portinstall openssh-portable) you will have 
to use portable to build with pam if I remember rightly. 
The version in the base system does not actualy have the vulnerability
Nessus is refering to as it was patched umm 2003-10-05
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-03:15.openssh.a
sc

In terms of gotchas there arent many, 
Read /usr/ports/security/openssh(-portable)/pkg-message 
And unless you use the OPENSSH_OVERWRITE_BASE option I think you may have to

manualy move your existing hostkeys to /usr/local/etc and re-edit the new 
Config files (I could be wrong here as it's a while since I bothered 
changing from the version in base) 


Vince

> -Original Message-
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of Ray Seals
> Sent: 19 July 2004 18:15
> To: [EMAIL PROTECTED]
> Subject: Nessus scan of FreeBSD 5.2.1 shows old version of ssh
> 
> I just ran a Nessus scan against one of my machines.  The 
> scan triggered on a version of ssh older than 3.7.1.
> 
> I ran /usr/bin/ssh -v and found that I have version 3.6.1p1.  
> I'm looking for the best way to upgrade this.  Can I just 
> install and run 'portupgrade' on SSH?  What are some of the 
> "gotcha" points on doing this?
> 
> --
> Ray Seals <[EMAIL PROTECTED]>
> 
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