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Glibc Pointer guarding weakness
From: Hector Marco-Gisbert <hecmargi () upv es>
Date: Sat, 5 Sep 2015 18:49:15 +0200
Hello,A weakness in the dynamic loader have been found, Glibc prior to 2.22.90 are affected. The issue is that the LD_POINTER_GUARD in the environment is not sanitized allowing local attackers easily to bypass the pointer guarding protection on set-user-ID and set-group-ID programs.
Details and PoC at: http://hmarco.org/bugs/glibc_ptr_mangle_weakness.htmlA patch is already sent to Glibc maintainers. This issue is similar to http://hmarco.org/bugs/CVE-2013-4788.html but now affect to dynamic linked applications.
-- Hector Marco-Gisbert @ http://hmarco.org/ Cyber Security Researcher @ http://cybersecurity.upv.es Universitat Politècnica de València (Spain) _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/
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- Glibc Pointer guarding weakness Hector Marco-Gisbert (Sep 07)