Arch Linux: ASA-201705-3 High: Ghostscript Arbitrary Command Execution

Arch Linux Security Advisory ASA-201705-3
========================================
Severity: High
Date    : 2017-05-07
CVE-ID  : CVE-2017-8291
Package : ghostscript
Type    : arbitrary command execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-256

Summary
======
The package ghostscript before version 9.21-2 is vulnerable to
arbitrary command execution.

Resolution
=========
Upgrade to 9.21-2.

# pacman -Syu "ghostscript>=9.21-2"

The problem has been fixed upstream but no release is available yet.

Workaround
=========
None.

Description
==========
It was found that ghostscript did not properly validate the parameters
passed to the .rsdparams and .eqproc functions. During its execution, a
specially crafted PostScript document could execute code  via a
"/OutputFile (%pipe%" substring in the context of the ghostscript
process, bypassing the -dSAFER protection.

Impact
=====
A remote attacker is able to execute arbitrary commands via a specially
crafted PostScript document.

References
=========
https://bugs.ghostscript.com/show_bug.cgi?id=697808
https://security.archlinux.org/CVE-2017-8291