SeaMonkey is an open source web browser, email and newsgroup client, IRC chat client, and HTML editor.
Several flaws were 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-2010-3176, CVE-2010-3180)
A flaw was found in the script that launches SeaMonkey. The LD_LIBRARY_PATH variable was appending a "." character, which could allow a local attacker to execute arbitrary code with the privileges of a different user running SeaMonkey, if that user ran SeaMonkey from within an attacker-controlled directory. (CVE-2010-3182)
It was found that the SSL DHE (Diffie-Hellman Ephemeral) mode implementation for key exchanges in SeaMonkey accepted DHE keys that were 256 bits in length. This update removes support for 256 bit DHE keys, as such keys are easily broken using modern hardware. (CVE-2010-3173)
A flaw was found in the way SeaMonkey matched SSL certificates when the certificates had a Common Name containing a wildcard and a partial IP address. SeaMonkey incorrectly accepted connections to IP addresses that fell within the SSL certificate's wildcard range as valid SSL connections, possibly allowing an attacker to conduct a man-in-the-middle attack. (CVE-2010-3170)
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.