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TITLE:
FreeType2 Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA40816

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http://secunia.com/advisories/40816/
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https://ca.secunia.com/?page=viewadvisory&vuln_id=40816

RELEASE DATE:
2010-08-07

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http://secunia.com/advisories/40816/#comments

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http://secunia.com/advisories/40816/

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DESCRIPTION:
Some vulnerabilities have been reported in FreeType2, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
compromise an application using the library.

1) Two vulnerabilities are caused due to errors when processing
certain opcodes of Compact Font Format (CFF) fonts, which can be
exploited to cause a stack corruption by tricking a user into
processing a specially crafted CFF font in an application using the
library.

This is related to:
SA40807

2) A boundary error exists within the "Mac_Read_POST_Resource()"
function in src/base/ftobjs.c when processing certain Adobe Type 1
Mac Font File (LWFN) fonts, which can be exploited to cause a
heap-based buffer overflow by tricking a user into processing a
specially crafted LWFN font in an application using the library.

SOLUTION:
Fixed in the GIT repository.

PROVIDED AND/OR DISCOVERED BY:
1) comex, disclosed via jailbreakme.com. 
Additional information provided by Braden Thomas, Apple Product
Security Team.
2) Robert Swiecki

ORIGINAL ADVISORY:
1)
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=018f5c27813dd7eef4648fe254632ecea0c85a50
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=11d65e8a1f1f14e56148fd991965424d9bd1cdbc
2)
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=81f3472c0ba7b8f6466e2e214fa8c1c17fade975
https://savannah.nongnu.org/bugs/?30658

OTHER REFERENCES:
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http://secunia.com/products/corporate/EVM/

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EXTENDED DESCRIPTION:
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EXTENDED SOLUTION:
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EXPLOIT:
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