Two vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious people to compromise a user's system
1) An integer overflow error in the Vector Markup Language (VML) implementation when processing recolorinfo sections can be exploited to cause a heap-based buffer overflow via e.g. a specially crafted web page or HTML e-mail.
Successful exploitation allows execution of arbitrary code.
NOTE: According to Microsoft, this vulnerability is being actively exploited.
2) A signedness error in the Vector Markup Language (VML) implementation when handling shape types can be exploited to reference user-controlled memory and cause a memory corruption, which may allow execution of arbitrary code.
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Subject: Microsoft Windows Vector Markup Language Vulnerabilities
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