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TITLE:
FreeType Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA34723

VERIFY ADVISORY:
http://secunia.com/advisories/34723/

DESCRIPTION:
Some vulnerabilities have been reported in FreeType, which can be
exploited by malicious people to potentially compromise an
application using the library.

1) An integer overflow error within the "cff_charset_compute_cids()"
function in cff/cffload.c can be exploited to potentially cause a
heap-based buffer overflow via a specially crafted font.

2) Multiple integer overflow errors within validation functions in
sfnt/ttcmap.c can be exploited to bypass length validations and
potentially cause buffer overflows via specially crafted fonts.

3) An integer overflow error within the "ft_smooth_render_generic()"
function in smooth/ftsmooth.c can be exploited to potentially cause a
heap-based buffer overflow via a specially crafted font.

Successful exploitation may allow execution of arbitrary code.

The vulnerabilities are reported in version 2.3.9. Other versions may
also be affected.

SOLUTION:
Fixed in the GIT repository.
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=79972af4f0485a11dcb19551356c45245749fc5b
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=a18788b14db60ae3673f932249cd02d33a227c4e
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=0a05ba257b6ddd87dacf8d54b626e4b360e0a596
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=0545ec1ca36b27cb928128870a83e5f668980bc5

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Tavis Ormandy.

ORIGINAL ADVISORY:
http://git.savannah.gnu.org/cgit/freetype/freetype2.git/tree/ChangeLog

OTHER REFERENCES:
https://bugzilla.redhat.com/show_bug.cgi?id=491384

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