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Bug 1429452 - (CVE-2016-10243) CVE-2016-10243 texlive: mpost allows to run non-whitelisted external programs
CVE-2016-10243 texlive: mpost allows to run non-whitelisted external programs
Status: CLOSED WONTFIX
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20161128,repor...
: Security
Depends On: 1429454
Blocks: 1429453
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Reported: 2017-03-06 07:14 EST by Andrej Nemec
Modified: 2017-03-08 02:54 EST (History)
3 users (show)

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Last Closed: 2017-03-08 02:54:12 EST
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Description Andrej Nemec 2017-03-06 07:14:23 EST 
The TeX system allows for calling external programs from within the TeX source code (called \write18). This has been restricted to a small set of programs since a long time ago.

Unfortunately it turned out that one program in the list, mpost (also shipped with TeX Live), allows in turn to specify other programs to be run, which allows arbitrary code execution when compiling a TeX document.

References:

http://seclists.org/oss-sec/2017/q1/555
https://scumjr.github.io/2016/11/28/pwning-coworkers-thanks-to-latex/

Upstream patch:

https://www.tug.org/svn/texlive?view=revision&revision=42605
Comment 1 Andrej Nemec 2017-03-06 07:16:38 EST 
Created texlive tracking bugs for this issue:

Affects: fedora-all [bug 1429454]
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