[ GLSA 200501-25 ] Squid: Multiple vulnerabilities

[GLSA]

Gentoo Linux Security Advisory

Title: Squid: Multiple vulnerabilities (GLSA 200501-25)
Severity: normal
Exploitable: remote
Date: January 16, 2005
Updated: February 07, 2005
Bug(s): #77934, #77521
ID: 200501-25

Synopsis

Squid contains vulnerabilities in the the code handling NTLM (NT Lan Manager), Gopher to HTML, ACLs and WCCP (Web Cache Communication Protocol) which could lead to ACL bypass, denial of service and arbitrary code execution.

Background

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.

Affected Packages

Package: net-proxy/squid
Vulnerable: < 2.5.7-r2
Unaffected: >= 2.5.7-r2
Architectures: All supported architectures


Description

Squid contains a vulnerability in the gopherToHTML function (CAN-2005-0094) and incorrectly checks the 'number of caches' field when parsing WCCP_I_SEE_YOU messages (CAN-2005-0095). Furthermore the NTLM code contains two errors. One is a memory leak in the fakeauth_auth helper (CAN-2005-0096) and the other is a NULL pointer dereferencing error (CAN-2005-0097). Finally Squid also contains an error in the ACL parsing code (CAN-2005-0194).

Impact

With the WCCP issue an attacker could cause denial of service by sending a specially crafted UDP packet. With the Gopher issue an attacker might be able to execute arbitrary code by enticing a user to connect to a malicious Gopher server. The NTLM issues could lead to denial of service by memory consumption or by crashing Squid. The ACL issue could lead to ACL bypass.

Workaround

There is no known workaround at this time.

Resolution

All Squid users should upgrade to the latest version: