Security update for teTeX
(Last modified: 21OCT2002)
solutions Security update for teTeX SuSE Linux Maintenance Web (3fa32df95c17439c9bbfcd7f41758a06)
SuSE Linux Enterprise Server 7 for S/390 and zSeries
SuSE Linux Enterprise Server for S/390
xdviboth have the ability to automatically generate TeX font files from metafont sources when displaying/converting a DVI document. This is done by invoking the
MakeTeXPKutility with the font name, plus a few other options.
Unfortunately, the code invoking
MakeTeXPKdid not properly sanitize the font name. By embedding shell meta characters in font names included in a DVI document, an attacker was able to execute arbitrary commands under the account of the user viewing or processing the document. This includes the printer daemon if you use
lpdfilterto transparently process document formats other than postscript, because
lpdfilterwill try to convert DVI files to PostScript(tm) using
rpm -Uvh tetex.rpm
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