Insufficient Data Type in nf_conntrack_extend.h Allows for Denial of Service in Linux Kernel

CVE-2014-9715 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

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.

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