Squid Web Proxy Cache hostname information disclosure

squid-hostname-information-disclosure (18406) The risk level is classified as MediumMedium Risk

Description:

Squid Web Proxy Cache could allow a remote attacker to obtain sensitive information. A remote attacker could send a URL request containing a malformed hostname to cause an error message to be returned disclosing sensitive information.

Platforms Affected:

  • FreeBSD, FreeBSD
  • OpenBSD, OpenBSD
  • RedHat, Enterprise Linux 2.1 AS
  • RedHat, Enterprise Linux 2.1 ES
  • RedHat, Enterprise Linux 2.1 WS
  • RedHat, Enterprise Linux 3 WS
  • RedHat, Enterprise Linux 3 ES
  • RedHat, Enterprise Linux 3 Desktop
  • RedHat, Enterprise Linux 3 AS
  • RedHat, Enterprise Linux 4 WS
  • RedHat, Enterprise Linux 4 Desktop
  • RedHat, Enterprise Linux 4 AS
  • RedHat, Enterprise Linux 4 ES
  • RedHat, Linux Advanced Workstation 2.1 Itanium
  • Squid-Cache, Squid 2.5.STABLE1
  • Squid-Cache, Squid 2.5.STABLE2
  • Squid-Cache, Squid 2.5.STABLE3
  • Squid-Cache, Squid 2.5.STABLE4
  • Squid-Cache, Squid 2.5.STABLE5
  • Squid-Cache, Squid 2.5.STABLE6
  • Squid-Cache, Squid 2.5.STABLE7

Remedy:

Apply the 2.5.STABLE7-dothost patch, available from the Squid Web Proxy Cache Web site. See References.

For Red Hat Linux:
Refer to RHSA-2005:766-7 for patch, upgrade, or suggested workaround information. See References.

Consequences:

Obtain Information

References:

  • Squid Bugzilla Bug 1143, Squid returns random error messages. at http://www.squid-cache.org/bugs/show_bug.cgi?id=1143.
  • Squid Web Proxy Cache Web site, Squid Web Proxy Cache at http://www.squid-cache.org.
  • BID-11865: Squid Proxy Failed DNS Lookup Random Error Messages Information Disclosure Vulnerability
  • CVE-2004-2479: Squid Web Proxy Cache 2.5 might allow remote attackers to obtain sensitive information via URLs containing invalid hostnames that cause DNS operations to fail, which results in references to previously used error messages.
  • OSVDB ID: 12282: Squid Malformed Host Name Error Message Information Disclosure
  • RHSA-2005-766: squid security update
  • SA13408: Squid Malformed Host Name Error Message Information Leakage
  • SECTRACK ID: 1012466: Squid May Disclose Random Internal Information to Remote Users

Reported:

Dec 09, 2004

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