Squid NTLM authentication denial of service
| squid-ntlm-authentication-dos (24282) |  Low Risk |
Description:
Squid is vulnerable to a denial of service attack. If NTLM authentication is used, changes to the authentication scheme could cause the service to crash.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Canonical, Ubuntu 5.04
- Debian, Debian Linux 3.1
- MandrakeSoft, Mandrake Linux 10.1 X86_64
- MandrakeSoft, Mandrake Linux 10.1
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux LE2005
- MandrakeSoft, Mandrake Linux LE2005 X86_64
- 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
- MandrakeSoft, Mandrake Multi Network Firewall 2.0
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 4 ES
- SGI, Advanced Linux Environment 3
- Squid-Cache, Squid 2.5.STABLE1
- Squid-Cache, Squid 2.5.STABLE10
- 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
- Turbolinux, Turbolinux 10 Server
- Turbolinux, Turbolinux 10 Server x64 Ed
- Turbolinux, Turbolinux 7 Server
- 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 2.5.STABLE10 patch or later for this vulnerability, available from the Squid 2.5 Web page. See References.
For Red Hat Linux:
Refer to RHSA-2006:0052-7 or RHSA-2006:0045-8 for patch, upgrade, or suggested workaround information. See References.
For Ubuntu Linux:
Refer to USN-192-1 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:
- SGI Security Advisory 20060401-01-U, SGI Advanced Linux Environment 3 Security Update #56 at ftp://patches.sgi.com/support/free/security/advisories/20060401-01.U.asc.
- Squid 2.5 Web page, Squid-2.5 Patches at http://www.squid-cache.org/Versions/v2/2.5/bugs/.
- ASA-2006-067: squid security update (RHSA-2006-0052)
- ASA-2006-072: squid security update (RHSA-2006-0045)
- BID-14977: Squid Proxy Client NTLM Authentication Denial Of Service Vulnerability
- CVE-2005-2917: Squid 2.5.STABLE10 and earlier, while performing NTLM authentication, does not properly handle certain request sequences, which allows attackers to cause a denial of service (daemon restart).
- DSA-828: squid -- authentication handling
- MDKSA-2005:181: Updated squid packages fix vulnerabilities
- RHSA-2006-0045: squid security update
- RHSA-2006-0052: squid security update
- SA16992: Squid NTLM Authentication Handling Denial of Service
- SECTRACK ID: 1014920: Squid Can Be Crashed By Remote Users With Specially Crafted Authentication Headers
- SUSE-SR:2005:025: SUSE Security Summary Report
- SUSE-SR:2005:027: SUSE Security Summary Report
Reported:
Sep 30, 2005
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