Red Hat Security Advisory 2013-0821-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. Several flaws were found in the processing of malformed content. Malicious content could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird. A flaw was found in the way Thunderbird handled Content Level Constructors. Malicious content could use this flaw to perform cross-site scripting attacks.
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