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Netpbm: Arbitrary code execution in pstopnm


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200508-04 / Netpbm
Release Date August 05, 2005
Latest Revision May 28, 2009: 06
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
media-libs/netpbm < 10.28 >= 10.28, revision >= 10.26.32, revision >= 10.26.33, revision >= 10.26.42, revision >= 10.26.43, revision >= 10.26.44, revision >= 10.26.48, revision >= 10.26.49, revision >= 10.26.59, revision >= 10.26.61 All supported architectures

Related bugreports: #100398


The pstopnm utility, part of the Netpbm tools, contains a vulnerability which can potentially result in the execution of arbitrary code.

2.  Impact Information


Netpbm is a package of 220 graphics programs and a programming libraries, including pstopnm. pstopnm is a tool which converts PostScript files to PNM image files.


Max Vozeler reported that pstopnm calls the GhostScript interpreter on untrusted PostScript files without specifying the -dSAFER option, to convert a PostScript file into a PBM, PGM, or PNM file.


An attacker could craft a malicious PostScript file and entice a user to run pstopnm on it, resulting in the execution of arbitrary commands with the permissions of the user running pstopnm.

3.  Resolution Information


There is no known workaround at this time.


All Netpbm users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose media-libs/netpbm

4.  References


Page updated August 05, 2005

Summary: This is a Gentoo Linux Security Advisory

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