[ASA-202005-4] a2ps: multiple issues

[Morten Linderud]

Arch Linux Security Advisory ASA-202005-4
=========================================

Severity: High
Date    : 2020-05-06
CVE-ID  : CVE-2014-0466 CVE-2015-8107
Package : a2ps
Type    : multiple issues
Remote  : No
Link    : https://security.archlinux.org/AVG-1150

Summary
=======

The package a2ps before version 4.14-9 is vulnerable to multiple issues
including arbitrary command execution and arbitrary code execution.

Resolution
==========

Upgrade to 4.14-9.

# pacman -Syu "a2ps>=4.14-9"

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

Workaround
==========

None.

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

- CVE-2014-0466 (arbitrary command execution)

The fixps script in a2ps 4.14 does not use the -dSAFER option when
executing gs, which allows context-dependent attackers to delete
arbitrary files or execute arbitrary commands via a crafted PostScript
file.

- CVE-2015-8107 (arbitrary code execution)

A format string vulnerability in GNU a2ps 4.14 allows remote attackers
to execute arbitrary code.

Impact
======

A remote attacker can send crafted Postscript files which can execute
arbitrary commands or delete files from the system.

References
==========

https://github.com/akimd/a2ps/commit/5ea5ff8bc0094ca1eda0dd0e011d860e994c0a88
https://github.com/akimd/a2ps/commit/90b876cb480ca9e092490c825663f23909c6173c
https://security.archlinux.org/CVE-2014-0466
https://security.archlinux.org/CVE-2015-8107
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