AVG Anti-Virus .UPX file denial of service

avg-upx-dos (44057)

Low Risk

Description:

AVG Anti-Virus is vulnerable to a denial of service, caused by a divide-by-zero error when processing .UPX compressed executable files. By persuading a victim to scan a specially-crafted .UPX file, a remote attacker could crash the application.

*CVSS:

Base Score:	4.3
Access Vector:	Network
Access Complexity:	Medium
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	3.2
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of AVG Anti-Virus (8.0.156 or later), available from the AVG Web site. See References.

References:

• AVG Web site: Program update AVG 8.0.156.
• n.runs-SA-2008 004: AVG Antivirus UPX parsing Divide by Zero Advisory.
• BID-30417: AVG Anti-Virus UPX File Parsing Denial of Service Vulnerability
• CVE-2008-3373: The files parsing engine in Grisoft AVG Anti-Virus before 8.0.156 allows remote attackers to cause a denial of service (engine crash) via a crafted UPX compressed file, which triggers a divide-by-zero error.
• SA31290: AVG Anti-Virus UPX Processing Denial of Service
• SECTRACK ID: 1020570: AVG Anti-Virus UPX File Parsing Bug Lets Remote Users Deny Service
• VUPEN/ADV-2008-2225: AVG Anti-Virus UPX File Processing Denial of Service Vulnerability

Platforms Affected:

• Grisoft AVG Anti-Virus 7.1
• Grisoft AVG Anti-Virus 7.5
• Grisoft AVG Anti-Virus 8.0

Reported:

Jul 28, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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IBM Internet Security Systems is a trusted security advisor to thousands of the world's leading businesses and governments, helping to provide pre-emptive protection for networks, desktops and servers. The IBM Proventia? integrated security platform is designed to automatically protect against both known and unknown threats, helping to keep networks up and running and shield customers from online attacks before they impact business assets. IBM Internet Security Systems products and services are based on the proactive security intelligence of its X-Force? research and development team ? an unequivocal world authority in vulnerability and threat research. The IBM Internet Security Systems product line is also complemented by comprehensive Managed Security Services and Professional Security Services. For more information, visit the IBM Internet Security Systems Web site at www.iss.net or call 800-776-2362.