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Credit:
The original article can be found at: http://www.zerodayinitiative.com/advisories/ZDI-11-123/
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Vulnerable Systems:
* Microsoft Office PowerPoint
User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the ppcore.dll module responsible for parsing PowerPoint (ppt) files. When parsing a malformed TimeCommandBehaviorContainer structure the process raises an exception that causes an object in memory to be freed prior to being fully parsed. Due to the lack of a check that this object has been freed, a later function references an invalid pointer element. This can be leveraged by a remote attacker to execute arbitrary code under the context of the user running PowerPoint.
Patch Availability:
Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://www.microsoft.com/technet/security/Bulletin/MS11-022.mspx
CVE Information:
CVE-2011-0655
Disclosure Timeline:
2010-09-24 - Vulnerability reported to vendor
2011-04-12 - Coordinated public release of advisory
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