Apple Preview libFontParser SpecialEncoding Remote Code Execution VulnerabilityZDI-10-076: April 14th, 2010
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This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Preview. User interaction is required in that a target must open a malicious file or visit a malicious page.
The specific flaw exists within the routine TType1ParsingContext::SpecialEncoding() defined in libFontParser.dylib. While parsing glyphs from a PDF document, a malformed offset greater than 0x400 can result in a heap corruption which can be leveraged by an attacker to execute arbitrary code under the context of the current user.
Vendor ResponseApple has issued an update to correct this vulnerability. More details can be found at:
2010-03-26 - Vulnerability reported to vendor
2010-04-14 - Coordinated public release of advisory
CreditThis vulnerability was discovered by: