Two vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious, local users to gain escalated privileges and potentially by malicious people to compromise a user's system.
1) An error in the parsing of OTF (OpenType Font) files can be exploited by loading a properly formatted font and then reload it with specially crafted offset and length fields for the head table of the font.
2) A logic error when parsing Unicode BMP (UCS-2) strings in a naming table can be exploited to cause a buffer overflow via a specially crafted OpenType font.
Successful exploitation of the vulnerabilities may allow execution of arbitrary code with kernel privileges. For third-party web browsers natively rendering OpenType Fonts (OTF), this may be exploited remotely when a user visits a web page embedding a specially crafted font.
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Subject: Microsoft Windows OpenType Font Parsing Two Vulnerabilities
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