Microsoft .NET Framework Undersized Glyph Buffer Remote Code Execution Vulnerability

August 3rd, 2012
ZDI-12-131 ZDI-CAN-1432

CVE ID

CVE-2012-0162

CVSS Score

7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected Vendors

Microsoft

Affected Products

.NET

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of the .NET Framework. 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 Microsoft .NET handling of XAML Browser Applications (XBAP) graphics components. It is possible to cause an undersized allocation for a buffer which is populated with user-supplied glyph data, resulting in memory corruption which can be leveraged to remotely execute code.

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
http://technet.microsoft.com/en-us/security/bulletin/ms12-034

Disclosure Timeline

  • 2011-12-07 - Vulnerability reported to vendor
  • 2012-08-03 - Coordinated public release of advisory

Credit

Vitaliy Toropov

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