Multiple AVG products ZIP security bypass

avg-zip-security-bypass (50426) The risk level is classified as MediumMedium Risk

Description:

Multiple AVG products could allow a remote attacker to bypass security restrictions, caused by a vulnerability in the file parsing engine. By sending a specially-crafted ZIP file to a vulnerable system, a remote attacker could exploit this vulnerability to bypass scanning detection and possibly launch further attacks on the vulnerable system.

*CVSS:

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

Consequences:

Bypass Security

Remedy:

Upgrade to the latest version of AVG (8.5 build 323 or later), available from the AVG Web site. See References.

References:

  • AVG Web site: AVG Antivirus and Security Software.
  • Secdev - Thierry Zoller Blog: Advisory: AVG Zip evasion / bypass.
  • BID-34895: Multiple AVG Products RAR/ZIP Files Scan Evasion Vulnerability
  • CVE-2009-1784: The AVG parsing engine 8.5 323, as used in multiple AVG anti-virus products including Anti-Virus Network Edition, Internet Security Netzwerk Edition, Server Edition für Linux/FreeBSD, Anti-Virus SBS Edition, and others allows remote attackers to bypass malware detection via a crafted (1) RAR and (2) ZIP archive.
  • OSVDB ID: 54715: AVG Multiple Products RAR Archive Scanning Bypass
  • OSVDB ID: 54716: AVG Multiple Products ZIP Archive Scanning Bypass

Platforms Affected:

  • AVG AVG Anti-Virus 6.0.710
  • AVG AVG Anti-Virus 7.0
  • AVG AVG Anti-Virus 7.0.251
  • AVG AVG Anti-Virus 7.0.323
  • AVG AVG Anti-Virus 7.1.308
  • AVG AVG Anti-Virus 7.1.407
  • AVG AVG Anti-Virus 7.5.448
  • AVG AVG Anti-Virus 7.5.476
  • AVG AVG Anti-Virus 8.0
  • AVG AVG Anti-Virus 8.0.156

Reported:

May 08, 2009

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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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