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TITLE:
Internet Explorer XML Processing Memory Corruption

SECUNIA ADVISORY ID:
SA33089

VERIFY ADVISORY:
http://secunia.com/advisories/33089/

CRITICAL:
Extremely critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Microsoft Internet Explorer 7.x
http://secunia.com/advisories/product/12366/

DESCRIPTION:
A vulnerability has been discovered in Internet Explorer, which can
be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an error when processing XML tags
and can be exploited to dereference freed memory via a specially
crafted HTML document.

Successful exploitation allows execution of arbitrary code.

NOTE: Reportedly, the vulnerability is currently being actively
exploited.

The vulnerability is confirmed in Internet Explorer 7 on a fully
patched Windows XP SP3. Other versions may also be affected.

SOLUTION:
Do not browse untrusted websites or follow untrusted links.

PROVIDED AND/OR DISCOVERED BY:
Reported as a 0-day.

ORIGINAL ADVISORY:
KnownSec:
http://www.scanw.com/blog/archives/303

OTHER REFERENCES:
McAfee Avert Labs:
http://www.avertlabs.com/research/blog/index.php/2008/12/09/yet-another-unpatched-drive-by-exploit-found-on-the-web/

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Definitions: (Criticality, Where etc.)
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