Squid Web Proxy Cache NTLMSSP packet denial of service
| squid-ntlmssp-dos (17218) |  Low Risk |
Description:
Squid Web Proxy Cache is vulnerable to a denial of service attack. The ntlm_fetch_string function in the ntlmauth.c file fails to properly validate negative values. By sending a malicious NTLMSSP packet, a remote attacker could cause Squid Web Proxy Cache to crash.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Conectiva, Linux 10
- Conectiva, Linux 9.0
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 10.0 AMD64
- MandrakeSoft, Mandrake Linux 10.0
- MandrakeSoft, Mandrake Linux 9.2
- MandrakeSoft, Mandrake Linux 9.2 AMD64
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 ES
- Squid-Cache, Squid 2.0.PATCH2
- Squid-Cache, Squid 2.1.PATCH2
- Squid-Cache, Squid 2.3.STABLE5
- Squid-Cache, Squid 2.4
- Squid-Cache, Squid 2.4.STABLE7
- Squid-Cache, Squid 2.5.STABLE1
- 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 3.0.PRE1
- Squid-Cache, Squid 3.0.PRE2
- Squid-Cache, Squid 3.0.PRE3
- SuSE, Linux Enterprise Server 8
- SuSE, Linux Enterprise Server 9
- SuSE, SuSE Linux 8.1
- SuSE, SuSE Linux 8.2
- SuSE, SuSE Linux 9.0
- SuSE, SuSE Linux 9.1
- SuSE, SuSE Linux Desktop 1.0
- Turbolinux, Turbolinux 7 Server
- Turbolinux, Turbolinux 7 Workstation
- Turbolinux, Turbolinux 8 Server
- Turbolinux, Turbolinux 8 Workstation
- Turbolinux, Turbolinux Appliance Server 1.0
- Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
Remedy:
Apply the squid-2.5.STABLE6-ntlm_fetch_string patch, available from the Squid Web Proxy Cache Web site. See References.
For Gentoo Linux:
Upgrade to the latest version of squid (2.5.6-r2, < 2.5 or later), as listed in GLSA 200409-04. See References.
For Mandrake Linux:
Upgrade to the latest squid package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:093 : squid for more information. See References.
Mandrake Linux 9.2: 2.5.STABLE3-3.3.92mdk or later
Mandrake Linux 10.0: 2.5.STABLE4-2.1.100mdk or later
For Red Hat Linux:
Upgrade to the latest squid package, as listed below. Refer to RHSA-2004:462-10 for more information. See References.
Red Hat Enterprise Linux AS (v. 3), ES (v. 3), WS (v. 3), Desktop: 2.5.STABLE3-6.3E.1.x86_64 or later
For Conectiva Linux:
Upgrade to the latest squid package, as listed below. Refer to Conectiva Linux Security Announcement CLSA-2004:882 for more information. See References.
Conectiva Linux 10.0: 2.5.5-63116U10_4cl or later
Conectiva Linux 9: 2.5.5-25761U90_7cl or later
For Ubuntu Linux:
Upgrade to the latest squid package (2.5.5-6ubuntu0.2 or later), as listed in USN-19-1 November 06, 2004. See References.
For Turbolinux:
Upgrade to the latest squid package, as listed below. Refer to Turbolinux Security Advisory TLSA-2004-29 for more information. See References.
Turbolinux Appliance Server 1.0 Hosting Edition, Turbolinux Appliance Server 1.0 Workgroup Edition, Turbolinux 8 Server, Turbolinux 8 Workstation, Turbolinux 7 Server, Turbolinux 7 Workstation: 2.5.STABLE6-11 or later
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- Bugzilla Bug 1045 , ntlm_fetch_string wrong "if" statement at http://www.squid-cache.org/bugs/show_bug.cgi?id=1045.
- Conectiva Linux Security Announcement CLSA-2004:882, Fixes for squid vulnerabilities at http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000882.
- Squid Web Proxy Cache Web site, Squid at http://www1.uk.squid-cache.org/.
- BID-11098: Squid Proxy NTLM Authentication Denial Of Service Vulnerability
- CVE-2004-0832: The (1) ntlm_fetch_string and (2) ntlm_get_string functions in Squid 2.5.6 and earlier, with NTLM authentication enabled, allow remote attackers to cause a denial of service (application crash) via an NTLMSSP packet that causes a negative value to be passed to memcpy.
- GLSA-200409-04: Squid: Denial of service when using NTLM authentication
- MDKSA-2004:093: Updated squid packages fix DoS vulnerability
- RHSA-2004-462: squid security update
- SUSE-SA:2004:032: apache2: remote denial-of-service
- SUSE-SA:2004:033: gtk2 gdk-pixbuf: remote code execution
- SUSE-SA:2004:034: XFree86-libs xshared: remote command execution
Reported:
Sep 03, 2004
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