Squid: Denial of Service vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200509-06 / Squid
Release Date	September 07, 2005
Latest Revision	May 22, 2006: 03
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-proxy/squid	< 2.5.10-r2	>= 2.5.10-r2	All supported architectures

Related bugreports: #104603

Synopsis

Squid contains several bugs when handling certain malformed requests resulting in a Denial of Service.

2. Impact Information

Background

Squid is a full-featured Web proxy cache designed to run on Unix-like systems. It supports proxying and caching of HTTP, FTP, and other protocols, as well as SSL support, cache hierarchies, transparent caching, access control lists and many more features.

Description

Certain malformed requests result in a segmentation fault in the sslConnectTimeout function, handling of other certain requests trigger assertion failures.

Impact

By performing malformed requests an attacker could cause Squid to crash by triggering an assertion failure or invalid memory reference.

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-2.5.10-r2"

4. References

Page updated September 07, 2005

Summary: This is a Gentoo Linux Security Advisory

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