Adobe Reader CoolType Out-Of-Bounds Read

The Type1/CFF CharString interpreter code in the Adobe Reader CoolType.dll font library does not check if the input stream pointer has not gone beyond the end of the source buffer, which stores the state machine instructions. The Type1/CFF CharString interpreter code in the Adobe Reader...

K16380: FreeType vulnerabilities CVE-2014-9656 and CVE-2014-9659

Security Advisory Description CVE-2014-9656 The ttsbitdecoderloadimage function in sfnt/ttsbit.c in FreeType before 2.5.4 does not properly check for an integer overflow, which allows remote attackers to cause a denial of service out-of-bounds read or possibly have unspecified other impact via a...

Microsoft DirectWrite / AFDKO - Interpreter Stack Underflow in OpenType Font Handling Due to Missing CHKUFLOW

-----===== Background =====----- AFDKO Adobe Font Development Kit for OpenType is a set of tools for examining, modifying and building fonts. The core part of this toolset is a font handling library written in C, which provides interfaces for reading and writing Type 1, OpenType, TrueType to some...

One font vulnerability to rule them all #3: Windows 8.1 32-bit sandbox escape exploitation

Posted by Mateusz Jurczyk of Google Project Zero This is part 3 of the “One font vulnerability to rule them all” blog post series. In the previous posts, we introduced the “blend” PostScript operator vulnerability, discussed the Charstring primitives necessary to fully control the stack contents...

Stack overflow

cff/cf2intrp.c in the CFF CharString interpreter in FreeType before 2.5.4 proceeds with additional hints after the hint mask has been computed, which allows remote attackers to execute arbitrary code or cause a denial of service stack-based buffer overflow via a crafted OpenType font. NOTE: this...

UBUNTU-CVE-2014-9659

cff/cf2intrp.c in the CFF CharString interpreter in FreeType before 2.5.4 proceeds with additional hints after the hint mask has been computed, which allows remote attackers to execute arbitrary code or cause a denial of service stack-based buffer overflow via a crafted OpenType font. NOTE: this...