Squid Web Proxy Cache NTLM fakeauth_auth helper denial of service
| squid-ntlm-fakeauth-dos (18818) |  Low Risk |
Description:
Squid Web Proxy Cache is vulnerable to a denial of service attack, caused by a memory leak in the NTLM fakeauth_auth helper. A remote attacker could large amounts of memory, which would result in a denial of service.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Gentoo, Linux
- RedHat, Enterprise Linux 2.1 AW
- RedHat, Enterprise Linux 2.1 WS
- RedHat, Enterprise Linux 2.1 AS
- RedHat, Enterprise Linux 2.1 ES
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 WS
- 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 2.0.PATCH2
- Squid-Cache, Squid 2.1.PATCH2
- Squid-Cache, Squid 2.3.STABLE4
- Squid-Cache, Squid 2.3.STABLE5
- Squid-Cache, Squid 2.4
- Squid-Cache, Squid 2.4.STABLE2
- 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.STABLE9
- Squid-Cache, Squid 2.6.STABLE1
- SuSE, Linux Enterprise Server 8
- SuSE, SuSE Linux 8.1
- SuSE, SuSE Linux 8.2
- SuSE, SuSE Linux 9.0
- SuSE, SuSE Linux 9.1
- SuSE, SuSE Linux 9.2
- Turbolinux, Turbolinux 10 Server
- Turbolinux, Turbolinux 7 Server
- Turbolinux, Turbolinux 7 Workstation
- Turbolinux, Turbolinux 8 Server
- Turbolinux, Turbolinux 8 Workstation
- Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
Remedy:
Apply the squid-2.5.STABLE7-fakeauth_auth patch, available from the Squid Web Proxy Cache Web site. See References.
For Gentoo Linux:
Upgrade to the latest version of squid (2.5.7-r2 or later), as listed in GLSA 200501-25. See References.
For Ubuntu Linux:
Upgrade to the latest squid (2.5.5-6ubuntu0.3 or later), as listed in USN-67-1 January 20, 2005. See References.
For Red Hat Linux:
Upgrade to the latest squid package, as listed below. Refer to RHSA-2005:061-19 and RHSA-2005:060-20 for more information. See References.
Red Hat Enterprise Linux AS, ES, WS (v. 3) and Desktop 3: 2.5.STABLE3-6.3E.7 or later
Red Hat Enterprise Linux AS, ES, WS (v. 2.1) and Red Hat Linux Advanced Workstation 2.1: 2.4.STABLE7-1.21as.4 or later
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- CIAC Information Bulletin P-138, Updated Squid Package Fixes Security Issues at http://www.ciac.org/ciac/bulletins/p-138.shtml.
- SGI Security Advisory 20050207-01-U, SGI Advanced Linux Environment 3 Security Update #27 at ftp://patches.sgi.com/support/free/security/advisories/20050203-01-U.asc.
- Squid Web Proxy Cache Web site, fakeauth_auth memory leak and NULL pointer access at http://www.squid-cache.org/Versions/v2/2.5/bugs/#squid-2.5.STABLE7-fakeauth_auth.
- BID-12324: Squid Proxy NTLM Fakeauth_Auth Memory Leak Remote Denial Of Service Vulnerability
- CVE-2005-0096: Memory leak in the NTLM fakeauth_auth helper for Squid 2.5.STABLE7 and earlier allows remote attackers to cause a denial of service (memory consumption).
- GLSA-200501-25: Squid: Multiple vulnerabilities
- RHSA-2005-060: squid security update
- RHSA-2005-061: squid security update
- SECTRACK ID: 1012818: Squid NTLM fakeauth_auth Helper Can Be Crashed By Remote Users
- SUSE-SA:2005:006: squid: remote command execution
- SUSE-SR:2005:003: SUSE Security Summary Report
Reported:
Jan 10, 2005
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