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ClamAV Multiple Rem0te Buffer Overflows
From: list () rem0te com
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
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 – 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 who’s implementations are also likely vulnerable. Refer to vendor for
These vulnerabilities were discovered and researched by Neel Mehta & Alex Wheeler.
security () rem0te com
- ClamAV Multiple Rem0te Buffer Overflows list (Jul 25)