The PPPoL2TP feature in net/l2tp/l2tp_ppp.c in the Linux kernel through 3.15.6 allows local users to gain privileges by leveraging data-structure differences between an l2tp socket and an inet socket.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4943
Reference (s):
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3cf521f7dc87c031617fd47e4b7aa2593c2f3daf
- http://linux.oracle.com/errata/ELSA-2014-0924.html
- http://linux.oracle.com/errata/ELSA-2014-3047.html
- http://linux.oracle.com/errata/ELSA-2014-3048.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1119458