CentOS Errata and Security Advisory CESA-2012:0084
SeaMonkey is an open source web browser, e-mail and newsgroup client, IRC chat client, and HTML editor.
A flaw was found in the processing of malformed web content. A web page containing malicious content could cause SeaMonkey to crash or, potentially, execute arbitrary code with the privileges of the user running SeaMonkey. (CVE-2012-0442)
The same-origin policy in SeaMonkey treated http://example.com and http://[example.com] as interchangeable. A malicious script could possibly use this flaw to gain access to sensitive information (such as a client's IP and user e-mail address, or httpOnly cookies) that may be included in HTTP proxy error replies, generated in response to invalid URLs using square brackets. (CVE-2011-3670)
All SeaMonkey users should upgrade to these updated packages, which correct these issues. After installing the update, SeaMonkey must be restarted for the changes to take effect.
Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2012-February/018409.html
Affected packages: seamonkey seamonkey-chat seamonkey-devel seamonkey-dom-inspector seamonkey-js-debugger seamonkey-mail
Upstream details at: https://rhn.redhat.com/errata/RHSA-2012-0084.html