Technical Description

Multiple vulnerabilities have benn identified in Clam AntiVirus (ClamAV), which could be exploited by remote attackers to execute arbitrary commands or cause a denial of service.

The first issue is due to an integer overflow error in the PE header parser [libclamav/pe.c], which could be exploited by attackers to compromise a vulnerable system where the "ArchiveMaxFileSize" option has been disabled.

The second flaw is due to format string errors in certain logging functions [shared/output.c], which could be exploited by attackers to execute arbitrary commands.

The third vulnerability is due to an invalid memory access in the "cli_bitset_set()" [ibclamav/others.c] function, which could be exploited by attackers to crash a vulnerable application.

Affected Products

Clam AntiVirus (ClamAV) versions prior to 0.88.1

Solution

Upgrade to Clam AntiVirus (ClamAV) version 0.88.1 :
http://sourceforge.net/projects/clamav/

References

http://www.vupen.com/english/advisories/2006/1258
http://sourceforge.net/project/shownotes.php?release_id=407078

Credits

Vulnerabilities reported by Damian Put, David Luyer and the vendor.

ChangeLog

2006-04-06 : Initial release

Vulnerability Management

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