fbida: Arbitrary command execution

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200608-22 / fbida
Release Date	August 23, 2006
Latest Revision	August 23, 2006: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-gfx/fbida	< 2.03-r4	>= 2.03-r4	All supported architectures

Related bugreports: #141684

Synopsis

The fbgs script provided by fbida allows the execution of arbitrary code.

2. Impact Information

Background

fbida is a collection of image viewers and editors for the framebuffer console and X11. fbgs is a PostScript and PDF viewer for the linux framebuffer console.

Description

Toth Andras has discovered a typographic mistake in the "fbgs" script, shipped with fbida if the "fbcon" and "pdf" USE flags are both enabled. This script runs "gs" without the -dSAFER option, thus allowing a PostScript file to execute, delete or create any kind of file on the system.

Impact

A remote attacker can entice a vulnerable user to view a malicious PostScript or PDF file with fbgs, which may result with the execution of arbitrary code.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All fbida users with the "fbcon" and "pdf" USE flags both enabled should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/fbida-2.03-r4"

4. References

CVE-2006-3119

Updated August 23, 2006

Summary: This is a Gentoo Linux Security Advisory

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