CentOS Errata and Security Advisory CESA-2008:0214-01
Squid is a high-performance proxy caching server for Web clients, supporting FTP, gopher, and HTTP data objects.
A flaw was found in the way squid manipulated HTTP headers for cached objects stored in system memory. An attacker could use this flaw to cause a squid child process to exit. This interrupted existing connections and made proxy services unavailable. Note: the parent squid process started a new child process, so this attack only resulted in a temporary denial of service. (CVE-2008-1612)
Users of squid are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue.
Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2008-April/026849.html
Affected packages: squid
Upstream details at: https://rhn.redhat.com/errata/rh21as-errata.html