ZDI-09-012: Microsoft Internet Explorer Malformed CSS Memory Corruption

ZDI-09-012: Microsoft Internet Explorer Malformed CSS Memory Corruption
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-012
February 10, 2009

– CVE ID:
CVE-2009-0076

– Affected Vendors:
Microsoft

– Affected Products:
Microsoft Internet Explorer

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– Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Internet Explorer. User
interaction is required to exploit this vulnerability in that the target
must visit a malicious page.

The specific flaw exists when processing, in XHTML strict mode, a CSS
stylesheet containing a specific combination of style directives one of
which must be a 'zoom'. The fault in processing results in a memory
corruption vulnerability which can be leveraged to execute arbitrary
code under the context of the current user.

– Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:

http://www.microsoft.com/technet/security/bulletin/MS09-002.mspx

– Disclosure Timeline:
2008-10-15 - Vulnerability reported to vendor
2009-02-10 - Coordinated public release of advisory

– Credit:
This vulnerability was discovered by:
* Sam Thomas of eshu.co.uk

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