An updated squid package that fixes a security vulnerability is now available for CentOS Linux 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team.
Squid is a high-performance proxy caching server for Web clients, supporting FTP, gopher, and HTTP data objects. A denial of service flaw was found in the way Squid processed the TRACE request method. It was possible for an attacker behind the Squid proxy to issue a malformed TRACE request, crashing the Squid daemon child process. As long as these requests were sent, it would prevent legitimate usage of the proxy server. (CVE-2007-1560) This flaw does not affect the version of Squid shipped in CentOS Enterprise Linux 2.1, 3, or 4. Users of Squid should upgrade to this updated package, which contains a backported patch and is not vulnerable to this issue.
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