Squid Web Proxy Cache xstrndup function denial of service

squid-xstrndup-dos (19332) The risk level is classified as LowLow Risk

Description:

Squid Web Proxy Cache is vulnerable to a denial of service attack, caused by a vulnerability when handling FQDN lookups. A remote attacker could supply specially-crafted Domain Name System (DNS) responses to cause an error message to be displayed, resulting in a denial of service.

Platforms Affected:

  • Canonical, Ubuntu 4.10
  • Debian, Debian Linux 3.0
  • Gentoo, Linux
  • MandrakeSoft, Mandrake Linux 10.0 AMD64
  • MandrakeSoft, Mandrake Linux 10.0
  • MandrakeSoft, Mandrake Linux 10.1
  • MandrakeSoft, Mandrake Linux 10.1 X86_64
  • MandrakeSoft, Mandrake Linux 9.2 AMD64
  • MandrakeSoft, Mandrake Linux 9.2
  • MandrakeSoft, Mandrake Linux Corporate Server 2.1
  • MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
  • MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft, Mandrake Linux Corporate Server 3.0
  • 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 AS
  • RedHat, Enterprise Linux 3 Desktop
  • RedHat, Enterprise Linux 4 ES
  • RedHat, Enterprise Linux 4 WS
  • RedHat, Enterprise Linux 4 AS
  • RedHat, Enterprise Linux 4 Desktop
  • RedHat, Linux Advanced Workstation 2.1 Itanium
  • Squid-Cache, Squid 2.0.PATCH1
  • Squid-Cache, Squid 2.0.PATCH2
  • Squid-Cache, Squid 2.0.PRE1
  • Squid-Cache, Squid 2.0.RELEASE
  • Squid-Cache, Squid 2.1.PATCH1
  • Squid-Cache, Squid 2.1.PATCH2
  • Squid-Cache, Squid 2.1.PRE1
  • Squid-Cache, Squid 2.1.PRE3
  • Squid-Cache, Squid 2.1.PRE4
  • Squid-Cache, Squid 2.1.RELEASE
  • Squid-Cache, Squid 2.2.DEVEL3
  • Squid-Cache, Squid 2.2.DEVEL4
  • Squid-Cache, Squid 2.2.PRE1
  • Squid-Cache, Squid 2.2.PRE2
  • Squid-Cache, Squid 2.2.STABLE1
  • Squid-Cache, Squid 2.2.STABLE2
  • Squid-Cache, Squid 2.2.STABLE3
  • Squid-Cache, Squid 2.2.STABLE4
  • Squid-Cache, Squid 2.2.STABLE5
  • Squid-Cache, Squid 2.3.DEVEL2
  • Squid-Cache, Squid 2.3.DEVEL3
  • Squid-Cache, Squid 2.3.STABLE1
  • Squid-Cache, Squid 2.3.STABLE2
  • Squid-Cache, Squid 2.3.STABLE3
  • Squid-Cache, Squid 2.3.STABLE4
  • Squid-Cache, Squid 2.3.STABLE5
  • Squid-Cache, Squid 2.4
  • Squid-Cache, Squid 2.4.STABLE1
  • Squid-Cache, Squid 2.4.STABLE2
  • Squid-Cache, Squid 2.4.STABLE3
  • Squid-Cache, Squid 2.4.STABLE4
  • Squid-Cache, Squid 2.4.STABLE6
  • Squid-Cache, Squid 2.4.STABLE7
  • Squid-Cache, Squid 2.5.6
  • 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
  • Squid-Cache, Squid 2.5.STABLE8
  • Squid-Cache, Squid 2.5.STABLE9
  • SuSE, Linux Enterprise Server 8
  • SuSE, SuSE Linux 8.2
  • SuSE, SuSE Linux 9.0
  • SuSE, SuSE Linux 9.1
  • SuSE, SuSE Linux 9.2

Remedy:

Apply the patch for this vulnerability, available from the Squid 2.5 Patch Web page. See References.

For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest version of squid (2.4.6-2woody7 or later), as listed in DSA-688-1. See References.

For Red Hat Linux:
Refer to RHSA-2005:201-07 or RHSA-2005:173-09 for patch, upgrade, or suggested workaround information. See References.

For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2005-02-25 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux:
Refer to USN-84-1 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Refer to SUSE-SA:2005:008 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

Consequences:

Denial of Service

References:

  • Squid 2.5 Patch Web page, Squid-2.5 Patches at http://www.squid-cache.org/Versions/v2/2.5/bugs/.
  • BID-12551: Squid Proxy DNS Name Resolver Remote Denial Of Service Vulnerability
  • CVE-2005-0446: Squid 2.5.STABLE8 and earlier allows remote attackers to cause a denial of service (crash) via certain DNS responses regarding (1) Fully Qualified Domain Names (FQDN) in fqdncache.c or (2) IP addresses in ipcache.c, which trigger an assertion failure.
  • DSA-688: squid -- missing input sanitising
  • GLSA-200502-25: Squid: Denial of Service through DNS responses
  • MDKSA-2005:047: Updated squid packages fix vulnerability
  • RHSA-2005-173: squid security update
  • RHSA-2005-201: squid security update
  • SA14271: Squid FQDN Lookup Denial of Service Vulnerability
  • SUSE-SA:2005:008: squid: remote denial of service

Reported:

Feb 14, 2005

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