[arch-security] [ASA-201705-10] lib32-freetype2: arbitrary code execution

[Remi Gacogne]

Arch Linux Security Advisory ASA-201705-10
==========================================

Severity: High
Date    : 2017-05-10
CVE-ID  : CVE-2017-8105 CVE-2017-8287
Package : lib32-freetype2
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-258

Summary
=======

The package lib32-freetype2 before version 2.7.1-2 is vulnerable to
arbitrary code execution.

Resolution
==========

Upgrade to 2.7.1-2.

# pacman -Syu "lib32-freetype2>=2.7.1-2"

The problems have been fixed upstream but no release is available yet.

Workaround
==========

None.

Description
===========

- CVE-2017-8105 (arbitrary code execution)

FreeType 2 <= 2.7.1 has an out-of-bounds write caused by a heap-based
buffer overflow related to the t1_decoder_parse_charstrings function in
psaux/t1decode.c.

- CVE-2017-8287 (arbitrary code execution)

FreeType 2 <= 2.7.1 has an out-of-bounds write caused by a heap-based
buffer overflow related to the t1_builder_close_contour function in
psaux/psobjs.c.

Impact
======

A remote attacker can execute arbitrary code on the affected host via a
crafted font.

References
==========

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=941
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=935
https://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=f958c48ee431bef8d4d466b40c9cb2d4dbcb7791
https://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=3774fc08b502c3e685afca098b6e8a195aded6a0
https://security.archlinux.org/CVE-2017-8105
https://security.archlinux.org/CVE-2017-8287

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