Arch Linux alert ASA-202010-11 (lib32-freetype2)

From:
             
 
Morten Linderud <foxboron@archlinux.org>
To:
             
 
arch-security@archlinux.org
Subject:
             
 
[ASA-202010-11] lib32-freetype2: arbitrary code execution
Date:
             
 
Wed, 21 Oct 2020 09:06:44 +0200
Message-ID:
             
 
<20201021070644.fz2py7vcb4l6ccl5@anathema>
Arch Linux Security Advisory ASA-202010-11
==========================================

Severity: High
Date    : 2020-10-20
CVE-ID  : CVE-2020-15999
Package : lib32-freetype2
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-1255

Summary
=======

The package lib32-freetype2 before version 2.10.4-1 is vulnerable to
arbitrary code execution.

Resolution
==========

Upgrade to 2.10.4-1.

# pacman -Syu "lib32-freetype2>=2.10.4-1"

The problem has been fixed upstream in version 2.10.4.

Workaround
==========

None.

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

A heap buffer overflow has been found in freetype2 before 2.10.4.
Malformed TTF files with PNG sbit glyphs can cause a heap buffer
overflow in Load_SBit_Png as libpng uses the original 32-bit values,
which are saved in png_struct. If the original width and/or height are
greater than 65535, the allocated buffer won't be able to fit the
bitmap.

Impact
======

A remote user can serve malformed TTF files that can cause arbitrary
code execution on the affected host.

References
==========

http://git.savannah.nongnu.org/cgit/freetype/freetype2.gi...
https://savannah.nongnu.org/bugs/?59308
https://security.archlinux.org/CVE-2020-15999