Squid: Denial of Service

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200703-27 / squid
Release Date	March 31, 2007
Latest Revision	March 31, 2007: 01
Impact	low
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-proxy/squid	< 2.6.12	>= 2.6.12	All supported architectures

Related bugreports: #171681

Synopsis

Squid is affected by a Denial of Service vulnerability.

2. Impact Information

Background

Squid is a multi-protocol proxy server.

Description

Squid incorrectly handles TRACE requests that contain a "Max-Forwards" header field with value "0" in the clientProcessRequest() function.

Impact

A remote attacker can send specially crafted TRACE HTTP requests that will terminate the child process. A quickly repeated attack will lead to a Denial of Service.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Squid users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-proxy/squid-2.6.12"

4. References

CVE-2007-1560

Updated March 31, 2007

Summary: This is a Gentoo Linux Security Advisory

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