CVE-2012-0056 Information

Description

The mem_write function in the Linux kernel before 3.2.2 when ASLR is disabled does not properly check permissions when writing to /proc/pid/mem which allows local users to gain privileges by modifying process memory as demonstrated by Mempodipper.

Reference

http://blog.zx2c4.com/749 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=e268337dfe26dfc7efd422a804dbb27977a3cccc http://secunia.com/advisories/47708 http://ubuntu.com/usn/usn-1336-1 http://www.kb.cert.org/vuls/id/470151 http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2 http://www.openwall.com/lists/oss-security/2012/01/18/1 http://www.openwall.com/lists/oss-security/2012/01/18/2 http://www.openwall.com/lists/oss-security/2012/01/19/4 http://www.openwall.com/lists/oss-security/2012/01/22/4 http://www.redhat.com/support/errata/RHSA-2012-0052.html http://www.redhat.com/support/errata/RHSA-2012-0061.html http://www.securityfocus.com/bid/51625 https://bugzilla.redhat.com/show_bug.cgi?id=782642