GLSA 200406-13: Squid: NTLM authentication helper buffer overflow

http://security.gentoo.org/

Severity:	high
Title:	Squid: NTLM authentication helper buffer overflow
Date:	06/17/2004
Bugs:	#53367
ID:	200406-13

Synopsis

Squid contains a bug where it fails to properly check bounds of the 'pass' variable.

Background

Squid contains a bug in the function ntlm_check_auth(). It fails to do proper bounds checking on the values copyied to the 'pass' variable.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-proxy/squid	<= 2.5.5-r1	>= 2.5.5-r2	All supported architectures

Description

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

Impact

If Squid is configured to use NTLM authentication, an attacker could exploit this vulnerability by sending a very long password. This could lead to arbitrary code execution with the permissions of the user running Squid.

Workaround

There is no known workaround at this time. All users are encouraged to upgrade to the latest available version.

Resolution

All Squid users should upgrade to the latest stable version:

    # emerge sync

    # emerge -pv ">=net-proxy/squid-2.5.5-r2"
    # emerge ">=net-proxy/squid-2.5.5-r2"

References

CAN-2004-0541

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200406-13.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.