Squid external_acl.c queue denial of service
| squid-externalacl-dos (31525) |  Low Risk |
Description:
Squid is vulnerable to a denial of service, caused by an infinite loop in the external_acl.c queue when it experiences high loads. A remote attacker could exploit this vulnerability to cause the consumption of all available CPU resources, resulting in a denial of service.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Squid (2.6.STABLE7 or later), available from the Squid Web site. See References.
For Turbolinux (Squid):
Refer to TLSA-2007-17 for patch, upgrade, or suggested workaround information. See References.
For Ubuntu Linux:
Refer to USN-414-1 for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 200701-22 for patch, upgrade, or suggested workaround information. See References.
For SUSE Linux (squid):
Refer to SUSE-SA:2007:012 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- Squid 2.6.STABLE7 ChangeLog: Changes to squid-2.6.STABLE7 (Jan 13 2007).
- Squid Web site: Squid Web Proxy Cache.
- BID-22203: Squid Proxy ACL Queue Overload Remote Denial of Service Vulnerability
- CVE-2007-0248: The aclMatchExternal function in Squid before 2.6.STABLE7 allows remote attackers to cause a denial of service (crash) by causing an external_acl queue overload, which triggers an infinite loop.
- GLSA-200701-22: Squid: Multiple Denial of Service vulnerabilities
- MDKSA-2007:026: Updated squid packages fix vulnerabilities
- SA23767: Squid Denial of Service Vulnerabilities
- SUSE-SA:2007:012: squid remote denial of service
Platforms Affected:
- Canonical Ubuntu 5.10
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 6.10
- Gentoo Linux
- MandrakeSoft Mandrake Linux 2006
- MandrakeSoft Mandrake Linux 2006 X86_64
- MandrakeSoft Mandrake Linux 2007 X86_64
- MandrakeSoft Mandrake Linux 2007
- MandrakeSoft Mandrake Linux Corporate Server 3.0
- MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft Mandrake Multi Network Firewall 2.0
- Novell Linux POS 9
- Novell Open Enterprise Server
- Novell Open Enterprise Server
- Novell OpenSUSE 10.2
- Novell UnitedLinux 1.0
- Squid-Cache Squid 2.5.STABLE11
- Squid-Cache Squid 2.5.STABLE12
- Squid-Cache Squid 2.5.STABLE13
- Squid-Cache Squid 2.5.STABLE14
- Squid-Cache Squid 2.6.STABLE1
- Squid-Cache Squid 2.6.STABLE2
- Squid-Cache Squid 2.6.STABLE3
- Squid-Cache Squid 2.6.STABLE4
- Squid-Cache Squid 2.6.STABLE5
- Squid-Cache Squid 2.6.STABLE6
- SuSE Linux Enterprise Server 8
- SUSE SuSE Linux 10.0
- SUSE SuSE Linux 10.1
- SUSE SuSE Linux 9.3
- SuSE SuSE Linux OpenExchange Server 4
- SuSE SuSE Linux Retail Solution 8
- SuSE SuSE Linux School Server
- SuSE SuSE Linux Standard Server 8
- SuSE SuSE SLED 10
- SuSE SuSE SLES 10
- SuSE SuSE SLES 9
- Turbolinux Turbolinux 10 Server
- Turbolinux Turbolinux 10 Server x64 Ed
- Turbolinux Turbolinux 8 Server
- Turbolinux Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed
- Turbolinux Turbolinux Appliance Server 2.0
Reported:
Jan 13, 2007
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For corrections or additions please email xforce@iss.net
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.