Arch Linux: ASA-201705-7 Critical: Freetype2 Arbitrary Code Execution

Arch Linux Security Advisory ASA-201705-7
========================================
Severity: High
Date    : 2017-05-09
CVE-ID  : CVE-2017-8105 CVE-2017-8287
Package : freetype2
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-257

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

Resolution
=========
Upgrade to 2.7.1-2.

# pacman -Syu "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://cgit.git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=f958c48ee431bef8d4d466b40c9cb2d4dbcb7791
https://cgit.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