xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder
authorAndy Whitcroft <apw@canonical.com>
Thu, 23 Mar 2017 07:45:44 +0000 (07:45 +0000)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 29 Mar 2017 15:40:15 +0000 (08:40 -0700)
commitf843ee6dd019bcece3e74e76ad9df0155655d0df
tree156446e52b8a6ccd1a8df21af470c163bfe966ab
parent677e806da4d916052585301785d847c3b3e6186a
xfrm_user: validate XFRM_MSG_NEWAE incoming ESN size harder

Kees Cook has pointed out that xfrm_replay_state_esn_len() is subject to
wrapping issues.  To ensure we are correctly ensuring that the two ESN
structures are the same size compare both the overall size as reported
by xfrm_replay_state_esn_len() and the internal length are the same.

CVE-2017-7184
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
net/xfrm/xfrm_user.c