I did a quick search and didn't find anything about this issue so here goes:

Serious vulnerabilities in several antivirus products could result in denial-of-service conditions, local privilege escalation and other negative consequences. Fixes are available for some of the problems.
When scanning compressed files for virus signatures, antivirus products usually decompress the file first. However, the products with the flaw often don't limit the size of the resulting decompressed file, and extremely large files (billions of zeroes, for instance) can overwhelm the products. Decompressing a large file can take up all available file space on a machine, maxing out CPU usage and causing denial-of-service conditions on the machine.
A different vulnerability in Symantec Corp.'s LiveUpdate can be fixed with the latest patches. A variety of Symantec products are vulnerable to the escalation of privileges to SYSTEM by a local user.
Full story HERE

If this is a duplicate post/thread, let me know and I'll delete this one.

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