An updated squid package that fixes a security vulnerability in the NTLM authentication helper is now available.
Squid is a full-featured Web proxy cache. An out of bounds memory read bug was found within the NTLM authentication helper routine. If Squid is configured to use the NTLM authentication helper, a remote attacker could send a carefully crafted NTLM authentication packet and cause Squid to crash. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0832 to this issue. Note: The NTLM authentication helper is not enabled by default in Red Hat Enterprise Linux 3. Red Hat Enterprise Linux 2.1 is not vulnerable to this issue as it shipped with a version of Squid which did not contain the vulnerable helper. Users of Squid should update to this erratum package, which contains a backported patch and is not vulnerable to this issue.