(RHSA-2011:0473) Critical: seamonkey security update

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 possibly lead to arbitrary code
execution with the privileges of the user running SeaMonkey.
(CVE-2011-0080)

An arbitrary memory write flaw was found in the way SeaMonkey handled
out-of-memory conditions. If all memory was consumed when a user visited a
malicious web page, it could possibly lead to arbitrary code execution
with the privileges of the user running SeaMonkey. (CVE-2011-0078)

An integer overflow flaw was found in the way SeaMonkey handled the HTML
frameset tag. A web page with a frameset tag containing large values for
the “rows” and “cols” attributes could trigger this flaw, possibly leading
to arbitrary code execution with the privileges of the user running
SeaMonkey. (CVE-2011-0077)

A flaw was found in the way SeaMonkey handled the HTML iframe tag. A web
page with an iframe tag containing a specially-crafted source address could
trigger this flaw, possibly leading to arbitrary code execution with the
privileges of the user running SeaMonkey. (CVE-2011-0075)

A flaw was found in the way SeaMonkey displayed multiple marquee elements.
A malformed HTML document could cause SeaMonkey to execute arbitrary code
with the privileges of the user running SeaMonkey. (CVE-2011-0074)

A flaw was found in the way SeaMonkey handled the nsTreeSelection element.
Malformed content could cause SeaMonkey to execute arbitrary code with the
privileges of the user running SeaMonkey. (CVE-2011-0073)

A use-after-free flaw was found in the way SeaMonkey appended frame and
iframe elements to a DOM tree when the NoScript add-on was enabled.
Malicious HTML content could cause SeaMonkey to execute arbitrary code with
the privileges of the user running SeaMonkey. (CVE-2011-0072)

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.