Ghostscript: Insecure temporary file use in multiple scripts
Gentoo Linux Security Advisory
||GLSA 200410-18 / Ghostscript
||October 20, 2004
||December 30, 2007: 02
All supported architectures
Multiple scripts in the Ghostscript package are vulnerable to symlink
attacks, potentially allowing a local user to overwrite arbitrary files
with the rights of the user running the script.
Ghostscript is a software package providing an interpreter for the
PostScript language and the PDF file format. It also provides output
drivers for various file formats and printers.
The pj-gs.sh, ps2epsi, pv.sh and sysvlp.sh scripts create temporary files
in world-writeable directories with predictable names.
A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When an
affected script is called, this would result in the file to be overwritten
with the rights of the user running the script, which could be the root
There is no known workaround at this time.
Ghostscript users on all architectures except PPC should upgrade to the
Code Listing 3.1: Resolution
# emerge sync
# emerge -pv ">=app-text/ghostscript-esp-7.07.1-r7"
# emerge ">=app-text/ghostscript-esp-7.07.1-r7"
Ghostscript users on the PPC architecture should upgrade to the latest
stable version on their architecture:
Code Listing 3.2: Resolution
# emerge sync
# emerge -pv ">=app-text/ghostscript-esp-7.05.6-r2"
# emerge ">=app-text/ghostscript-esp-7.05.6-r2"