Red Hat Bugzilla – Bug 164262
ClamAV: Multiple remote buffer overflows in versions <= 0.86.1
Last modified: 2007-11-30 17:11:10 EST
+++ This bug was initially created as a clone of Bug #164253 +++
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Description of problem:
Date: Mon, 25 Jul 2005 13:29:28 +0000
July 25, 2005
ClamAV is the most widely used GPL antivirus library today. It provides file
format support for virus analysis. During analysis ClamAV Antivirus Library is
vulnerable to buffer overflows allowing attackers complete control of the
system. These vulnerabilities can be exploited remotely without user interaction
or authentication through common protocols such as SMTP, SMB, HTTP, FTP, etc.
Specifically, ClamAV is responsible for parsing multiple file formats. At least
4 of its file format processors contain remote security bugs. Specifically,
during the processing of TNEF, CHM, & FSG formats an attacker is able to trigger
several integer overflows that allow attackers to overwrite heap data to obtain
complete control of the system. These vulnerabilities can be reached by default
and triggered without user interaction by sending an e-mail containing crafted data.
Successful exploitation of ClamAV protected systems allows attackers
unauthorized control of data and related privileges. It also provides leverage
for further network compromise. ClamAV implementations are likely vulnerable in
their default configuration.
ClamAV ï¿½ 0.86.1 (current) and prior
There are numerous implementations of ClamAV listed on their site which are
likely vulnerable. One party of note is Apple. Apple includes ClamAV by default
in Mac OS X Server. In addition, ClamAV has been ported to windows and a variety
of other platforms by third parties whoï¿½s implementations are also likely
vulnerable. Refer to vendor for specifics.
These vulnerabilities were discovered and researched by Neel Mehta & Alex Wheeler.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Install affected product version (ClamAV 0.86.1 or prior)
Resolved with the release of:
Thanks a lot for your efforts!