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CVE-2011-4089

Published: 29 October 2011

The bzexe command in bzip2 1.0.5 and earlier generates compressed executables that do not properly handle temporary files during extraction, which allows local users to execute arbitrary code by precreating a temporary directory.

Notes

AuthorNote
tyhicks
I don't believe that YAMA prevents this vulnerability.
It is not yet clear what versions are affected.
mdeslaur
PoC: http://www.exploit-db.com/exploits/18147/
PoC: http://pastebin.com/FaaEsXRW

Priority

Medium

Status

Package Release Status
bzip2
Launchpad, Ubuntu, Debian
hardy
Released (1.0.4-2ubuntu4.2)
lucid
Released (1.0.5-4ubuntu0.2)
maverick
Released (1.0.5-4ubuntu1.1)
natty
Released (1.0.5-6ubuntu1.11.04.1)
oneiric
Released (1.0.5-6ubuntu1.11.10.1)
upstream
Released (1.0.6-1)
Patches:
vendor: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=632862#5