The Quantum archive decompressor in Clam AntiVirus (ClamAV) before 0.86.1 allows remote attackers to cause a denial of service (application crash) via a crafted Quantum archive.

This advisory adds security support for the stable amd64 distribution.
It covers all security updates since the release of sarge, which were missing updated packages for the not yet official amd64 port. Future security advisories will include updates for this port as well.

Andrew Toller and Stefan Kanthak discovered that a flaw in libmspack's Quantum archive decompressor renders Clam AntiVirus vulnerable to a Denial of Service attack.

The updated packages have been patched to correct the problem.

A number of potential remote denial of service vulnerabilities have been identified in ClamAV. In addition to the four issues identified by CVE ID above, there are fixes for issues in libclamav/cvd.c and libclamav/message.c. Together, these issues could allow a carefully crafted message to crash a ClamAV scanner or exhaust various resources on the machine running the scanner.

The remote host is running ClamAV, an open-source antivirus solution for Unix-like systems.
This version of ClamAV is reported to be vulnerable to a flaw where the parsing of a malicious file will cause the ClamAV process to crash.  An attacker exploiting this flaw would need to be able to send a specially formed email to the system running ClamAV.  Successful exploitation would result in loss of service. 

The remote host is affected by the vulnerability described in GLSA-200506-23 (Clam AntiVirus: Denial of Service vulnerability)

    Andrew Toller and Stefan Kanthak discovered that a flaw in libmspack's     Quantum archive decompressor renders Clam AntiVirus vulnerable to a     Denial of Service attack.
  Impact :

    A remote attacker could exploit this vulnerability to cause a Denial of     Service by sending a specially crafted Quantum archive to the server.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Severity
57528	Debian DSA-773-1 : amd64 - several vulnerabilities	Nessus	Debian Local Security Checks	critical
18675	Mandrake Linux Security Advisory : clamav (MDKSA-2005:113)	Nessus	Mandriva Local Security Checks	low
18629	Debian DSA-737-1 : clamav - remote denial of service	Nessus	Debian Local Security Checks	medium
3033	ClamAV < 0.86.1 Content-parsing DoS (deprecated)	Nessus Network Monitor	Web Clients	medium
18564	GLSA-200506-23 : Clam AntiVirus: Denial of Service vulnerability	Nessus	Gentoo Local Security Checks	low

Detections

Analytics

CVE-2005-2056

medium

Tenable Plugins

critical

low

medium

medium

low