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>> teTeX DVI File Processing Multiple Buffer Overflow and Security Bypass
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Multiple vulnerabilities have been identified in teTeX, which could be exploited by attackers or malicious users to execute arbitrary code or bypass security restrictions.
The first issue is caused by a buffer overflow error in dvips when processing a DVI file with an overly long "href" tag, which could be exploited by attackers to crash an affected application or compromise a vulnerable system.
The second vulnerability is caused by an error in dvips that uses the insecure "tmpnam()" function, which could allow local users to obtain sensitive information and modify certain data by creating specially crafted temporary files.
The third issue is caused by buffer overflow errors in dviljk when processing specially crafted DVI files, which could be exploited by attackers to execute arbitrary code.
Affected Products
teTeX version 3.0 and prior
Solution
VUPEN Security is not aware of any vendor-supplied patch.
References
http://www.vupen.com/english/advisories/2007/3896
http://bugs.gentoo.org/attachment.cgi?id=135423
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=447081
Credits
Vulnerabilities reported by Bastien Roucaries and Joachim Schrod.
ChangeLog
2007-11-16 : Initial release
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