include/net/netfilter/nf_conntrack_extend.h in the netfilter subsystem in the Linux kernel before 3.14.5 uses an insufficiently large data type for certain extension data, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via outbound network traffic that triggers extension loading, as demonstrated by configuring a PPTP tunnel in a NAT environment.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9715
Reference (s):
- BID:73953
- URL: http://www.securityfocus.com/bid/73953
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=223b02d923ecd7c84cf9780bb3686f455d279279
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.5
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html