Clam AntiVirus CHM unpacker denial of service
| clamav-chm-dos (29608) |  Low Risk |
Description:
Clam AntiVirus is vulnerable to a denial of service, caused by an unspecified vulnerability in chmunpack.c, the CHM unpacker. By sending a specially-crafted CHM file through the scanning engine, a remote attacker could cause the affected application to crash when the malicious file is processed.
Platforms Affected:
- Clam Anti-Virus, ClamAV 0.88.4 and prior
- Debian, Debian Linux 3.1
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux 2007 X86_64
- MandrakeSoft, Mandrake Linux 2007
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 4.0
- MandrakeSoft, Mandrake Linux Corporate Server 4.0 X86_64
- Novell, Linux POS 9
- Novell, Open Enterprise Server
- Novell, Open Enterprise Server
- SuSE, SuSE SLES 10
- SuSE, SuSE SLES 9
Remedy:
Upgrade to the latest version of Clam AntiVirus (0.88.5 or later), available from SourceForge.net. See References.
For Debian GNU/Linux:
Refer to DSA-1196-1 for patch, upgrade, or suggested workaround information. See References.
For SUSE Linux:
Refer to SUSE-SA:2006:060 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- iDefense Labs PUBLIC ADVISORY: 10.15.06, Clam AntiVirus ClamAV CHM Chunk Name Length DoS Vulnerability at http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=423.
- SourceForge.net: Files, Clam AntiVirus - File Release Notes and Changelog - Release Name: 0.88.5 at http://sourceforge.net/project/shownotes.php?release_id=455799.
- BID-20537: Clam Anti-Virus CHM Unpacker Denial Of Service Vulnerability
- CVE-2006-5295: Unspecified vulnerability in ClamAV before 0.88.5 allows remote attackers to cause a denial of service (scanning service crash) via a crafted Compressed HTML Help (CHM) file that causes ClamAV to read an invalid memory location.
- DSA-1196: clamav -- several vulnerabilities
- MDKSA-2006:184: Updated clamav packages fix vulnerabilities
- SA22370: Clam AntiVirus CHM Unpacker and PE Rebuilding Vulnerabilities
- SA22488: Kolab Server ClamAV CHM Unpacker and PE Rebuilding Vulnerabilities
- SA22626: SnapGear Multiple Vulnerabilities
- SECTRACK ID: 1017068: Clam AntiVirus PE File Heap Overflow Lets Remote Users Execute Arbitrary Code
- SUSE-SA:2006:060: clamav security problems
- VUPEN/ADV-2006-4034: Clam AntiVirus PE Rebuilding and CHM Unpacker Code Execution and DoS Issues
- VUPEN/ADV-2006-4136: Kolab Server ClamAV Integer Overflow and Denial of Service Vulnerabilities
- VUPEN/ADV-2006-4264: SnapGear Security Update Fixes Multiple OpenSSL and ClamAV Vulnerabilities
Reported:
Oct 15, 2006
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