Signature Detail

APP: ClamAV UPX File Handling Heap Overflow (SMTP)

This signature detects attempts to exploit a known vulnerability agains Clam Anti-Virus. A successful attack can lead to a buffer overflow and arbitrary remote code execution within the context of the server.

Extended Description

ClamAV is prone to a heap buffer-overflow vulnerability because it fails to properly bounds-check user-supplied data before copying it to an insufficiently sized memory buffer. This issue occurs when the application attempts to handle compressed UPX files. Exploiting this issue could allow attacker-supplied machine code to execute in the context of the affected application. The issue would occur when the malformed file is scanned manually or automatically in deployments such as email gateways. ClamAV versions 0.88.2 and 0.88.3 are vulnerable to this issue; prior versions may also be affected.

Affected Products

• Clam Anti-Virus ClamAV 0.88.2
• Clam Anti-Virus ClamAV 0.88.3
• Debian Linux 3.1.0
• Gentoo Linux
• Mandriva Corporate Server 3.0.0
• Mandriva Corporate Server 3.0.0 X86 64
• Mandriva Linux Mandrake 2006.0.0
• Mandriva Linux Mandrake 2006.0.0 X86 64
• SuSE Linux Personal 10.0.0 OSS
• SuSE Linux Personal 10.1
• SuSE Linux Personal 9.2.0
• SuSE Linux Personal 9.2.0 X86 64
• SuSE Linux Personal 9.3.0
• SuSE Linux Personal 9.3.0 X86 64
• SuSE Linux Professional 10.0.0
• SuSE Linux Professional 10.0.0 OSS
• SuSE Linux Professional 10.1
• SuSE Linux Professional 9.2.0
• SuSE Linux Professional 9.2.0 X86 64
• SuSE Linux Professional 9.3.0
• SuSE Linux Professional 9.3.0 X86 64
• SuSE SUSE Linux Enterprise Server 10
• SuSE SUSE Linux Enterprise Server 9
• Trustix Secure Linux 2.2.0
• Trustix Secure Linux 3.0.0

References

• CVE: CVE-2006-4018