teTeX: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200711-26 / tetex
Release Date	November 18, 2007
Latest Revision	November 18, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
app-text/tetex	< 3.0_p1-r6	>= 3.0_p1-r6	All supported architectures

Related bugreports: #198238

Synopsis

Multiple vulnerabilities have been discovered in teTeX, possibly allowing to execute arbitrary code or overwrite arbitrary files.

2. Impact Information

Background

teTeX is a complete TeX distribution for editing documents.

Description

Joachim Schrod discovered several buffer overflow vulnerabilities and an insecure temporary file creation in the "dvilj" application that is used by dvips to convert DVI files to printer formats (CVE-2007-5937, CVE-2007-5936). Bastien Roucaries reported that the "dvips" application is vulnerable to two stack-based buffer overflows when processing DVI documents with long \href{} URIs (CVE-2007-5935). teTeX also includes code from Xpdf that is vulnerable to a memory corruption and two heap-based buffer overflows (GLSA 200711-22); and it contains code from T1Lib that is vulnerable to a buffer overflow when processing an overly long font filename (GLSA 200710-12).

Impact

A remote attacker could entice a user to process a specially crafted DVI or PDF file which could lead to the execution of arbitrary code with the privileges of the user running the application. A local attacker could exploit the "dvilj" vulnerability to conduct a symlink attack to overwrite arbitrary files.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All teTeX users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-text/tetex-3.0_p1-r6"

4. References

Updated November 18, 2007

Summary: This is a Gentoo Linux Security Advisory

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