Vigil@nce - Linux kernel: use after free via inet_frag_lru_add
March 2014 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can use a freed memory area in inet_frag_lru_add() of
the Linux kernel, in order to trigger a denial of service, and
possibly to execute code.
– Impacted products: Fedora, Linux
– Severity: 2/4
– Creation date: 04/03/2014
DESCRIPTION OF THE VULNERABILITY
IPv4 data can be fragmented in several fragments.
The inet_frag_intern() function manages these fragments. However,
the inet_frag_lru_add() function is called with an incorrect
locking sequence, so a memory area can be prematurely freed.
An attacker can therefore use a freed memory area in
inet_frag_lru_add() of the Linux kernel, in order to trigger a
denial of service, and possibly to execute code.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/Linux-kernel-use-after-free-via-inet-frag-lru-add-14353