squidGuard URL security bypass

squidguard-url-security-bypass (53922) The risk level is classified as MediumMedium Risk

Description:

squidGuard could allow a remote attacker to bypass security restrictions, caused by multiple buffer overflow errors when processing URLs. By sending an overly long URL, a remote attacker could exploit this vulnerability to bypass the URL filter.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: Partial
  Availability Impact: None
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

For squidGuard 1.3:
Apply the patch for this vulnerability (Patch 20091019), available from the squidGuard Web site. See References.

For squidGuard 1.4:
Apply the patch for this vulnerability (Patch 20091015), available from the squidGuard Web site. See References.

References:

  • squidGuard Web Site: Patch 20091015 for squidGuard version 1.3 and 1.4.
  • squidGuard Web Site: Patch 20091019 for squidGuard version 1.4.
  • BID-36800: squidGuard Multiple Security Bypass Vulnerabilities
  • CVE-2009-3826: Multiple buffer overflows in squidGuard 1.4 allow remote attackers to bypass intended URL blocking via a long URL, related to (1) the relationship between a certain buffer size in squidGuard and a certain buffer size in Squid and (2) a redirect URL that contains information about the originally requested URL.
  • DSA-2040: squidguard -- buffer overflow
  • MDVSA-2009:293: squidGuard
  • MDVSA-2009:293-1: squidGuard
  • SA37107: squidGuard Multiple Filter Bypass Security Issues
  • SECTRACK ID: 1023079: squidGuard Buffer Overflow Lets Remote Users Bypass URL Filtering
  • SUSE-SR:2010:015: SUSE Security Summary Report
  • VUPEN/ADV-2009-3013: squidGuard URL Processing Multiple Filter Bypass Vulnerabilities
  • VUPEN/ADV-2010-1043: Debian Security Update Fixes squidGuard Filter Bypass Vulnerabilities

Platforms Affected:

  • Debian Debian Linux 5.0
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux 2008.0
  • 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
  • MandrakeSoft Mandrake Multi Network Firewall 2.0
  • Mandriva Enterprise Server 5 X86_64
  • Mandriva Enterprise Server 5
  • Mandriva Linux 2009.0 X86_64
  • Mandriva Linux 2009.0
  • Mandriva Linux 2009.1
  • Mandriva Linux 2009.1 X86_64
  • squidGuard squidGuard 1.3
  • squidGuard squidGuard 1.4

Reported:

Oct 23, 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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