mailing list archives
Re: NASL 'Split' function Buffer overflow Vulnerability
From: Renaud Deraison <deraison () nessus org>
Date: Tue, 25 Apr 2006 13:09:28 -0400
On Apr 25, 2006, at 3:51 AM, OS2A BTO wrote:
We have discovered a vulnerability in libnasl of Nessus which can
cause Denial of
Service. We have attached the advisory which details the
also has the fix. A patch for libnasl 2.2.4 is included.
At the opposite of what the full advisory hints, this issue is NOT
On Nessus 2, the program is killed via abort(), on Nessus 3, a
segfault occurs due to an attempt to read an invalid location of the
memory (this location is not user-controlled).
There is a denial of service, though. However, the only way to
exploit it would be to load a rogue plugin in nessusd, which is
difficult since the plugins downloads are cryptographically signed.
The out-of-memory / bad pointer dereferencement condition will
nevertheless be addressed in Nessus 2.2.8 / 3.0.3.
ps: OS2A did not contact us prior to releasing this misleading
advisory. So much for 'responsible disclosure'.