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teTeX, pTeX, CSTeX: Multiple vulnerabilities


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200501-31 / teTeX
Release Date January 23, 2005
Latest Revision January 23, 2005: 01
Impact normal
Exploitable remote and local
Package Vulnerable versions Unaffected versions Architecture(s)
app-text/tetex < 2.0.2-r5 >= 2.0.2-r5 All supported architectures
app-text/cstetex < 2.0.2-r1 >= 2.0.2-r1 All supported architectures
app-text/ptex < 3.1.4-r2 >= 3.1.4-r2 All supported architectures

Related bugreports: #75801


teTeX, pTeX and CSTeX make use of vulnerable Xpdf code which may allow the remote execution of arbitrary code. Furthermore, the xdvizilla script is vulnerable to temporary file handling issues.

2.  Impact Information


teTeX is a complete and open source TeX distribution. CSTeX is another TeX distribution including Czech and Slovak support. pTeX is another alternative that allows Japanese publishing with TeX. xdvizilla is an auxiliary script used to integrate DVI file viewing in Mozilla-based browsers.


teTeX, pTeX and CSTeX all make use of Xpdf code and may therefore be vulnerable to the various overflows that were discovered in Xpdf code (CAN-2004-0888, CAN-2004-0889, CAN-2004-1125 and CAN-2005-0064). Furthermore, Javier Fernandez-Sanguino Pena discovered that the xdvizilla script does not handle temporary files correctly.


An attacker could design a malicious input file which, when processed using one of the TeX distributions, could lead to the execution of arbitrary code. Furthermore, a local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When xdvizilla is called, this would result in the file being overwritten with the rights of the user running the script.

3.  Resolution Information


There is no known workaround at this time.


All teTeX users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/tetex-2.0.2-r5"

All CSTeX users should also upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/cstetex-2.0.2-r1"

Finally, all pTeX users should upgrade to the latest version:

Code Listing 3.3: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/ptex-3.1.4-r2"

4.  References


Page updated January 23, 2005

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