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SYNTHESIS OF THE VULNERABILITY

A local privileged attacker can force a NULL pointer to be
dereferenced in Netlink via a sendmsg() on the Linux kernel, in
order to trigger a denial of service.

Impacted products: Linux

Severity: 1/4

Creation date: 14/08/2014

DESCRIPTION OF THE VULNERABILITY

The sendmsg() system call is used to send a message, for example
on a Netlink socket.

However, if the message name is NULL, the netlink_sendmsg()
function of the net/netlink/af_netlink.c file does not check if
this pointer is NULL, before using it.

A local privileged attacker can therefore force a NULL pointer to
be dereferenced in Netlink via a sendmsg() on the Linux kernel, in
order to trigger a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-NULL-pointer-dereference-via-netlink-sendmsg-15187