CVE-2016-3672 - Unlimiting the stack not longer disables ASLR

Hector Marco-Gisbert <[email protected]> Wed, 6 Apr 2016 14:58:48 +0200

Newsgroups	gmane.comp.security.oss.general,gmane.comp.security.fulldisclosure,gmane.comp.security.full-disclosure,gmane.comp.security.news.securitytracker,gmane.comp.security.bugtraq
Message-ID	<[email protected]>

Hi everyone,

We have fixed an old and very known weakness in the Linux ASLR implementation.

The weakness allowed any user able to running 32-bit applications in a x86
machine disable the ASLR by setting the RLIMIT_STACK resource to unlimited.

This is a very old trick to disable ASLR, but unfortunately it was still present
in current Linux systems.

Details at:
http://hmarco.org/bugs/CVE-2016-3672-Unlimiting-the-stack-not-longer-disables-ASLR.html


Best,
Hector.



-- 
Dr. Hector Marco-Gisbert @ http://hmarco.org/
Cyber Security Researcher @ http://cybersecurity.upv.es
Universitat Politècnica de València (Spain)