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Zero Day Initiative Advisory 11-316
Posted Oct 27, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-316 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Quicktime. 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 way Quicktime processes the matrix structures in the 'tkhd' atom for mp4 files. When the matrix structure contains large values a movs instruction can turn the value negative. When Quicktime later uses the function to determine where it should write its data it does check the upper boundaries, but not the lower ones causing a heap buffer underwrite. This can result in remote code execution under the context of the current user.

tags | advisory, remote, arbitrary, code execution
systems | apple
advisories | CVE-2011-3251
SHA-256 | 74594dbdae073622048f6651ace5317e0546240bb0f13a6f484ff95a939e5d92

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