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Ryan Ware 8592536bcf EVM: Use crypto_memneq() for digest comparisons 
commit 613317bd21 upstream.

This patch fixes vulnerability CVE-2016-2085.  The problem exists
because the vm_verify_hmac() function includes a use of memcmp().
Unfortunately, this allows timing side channel attacks; specifically
a MAC forgery complexity drop from 2^128 to 2^12.  This patch changes
the memcmp() to the cryptographically safe crypto_memneq().

Reported-by: Xiaofei Rex Guo <xiaofei.rex.guo@intel.com>
Signed-off-by: Ryan Ware <ware@linux.intel.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-17 12:31:04 -08:00
..
apparmor apparmor: clarify CRYPTO dependency 2015-10-22 11:11:28 +11:00
integrity EVM: Use crypto_memneq() for digest comparisons 2016-02-17 12:31:04 -08:00
keys KEYS: Fix keyring ref leak in join_session_keyring() 2016-01-31 11:28:53 -08:00
selinux Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/selinux into for-linus2 2015-11-26 15:04:19 +11:00
smack Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-11-10 18:11:41 -08:00
tomoyo LSM: Switch to lists of hooks 2015-05-12 15:00:41 +10:00
yama Adding YAMA hooks also when YAMA is not stacked. 2015-08-04 01:36:18 +10:00
commoncap.c capabilities: add a securebit to disable PR_CAP_AMBIENT_RAISE 2015-09-04 16:54:41 -07:00
device_cgroup.c security/device_cgroup: Fix RCU_LOCKDEP_WARN() condition 2015-09-03 18:13:10 -07:00
inode.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-07-04 19:36:06 -07:00
Kconfig Yama: remove needless CONFIG_SECURITY_YAMA_STACKED 2015-07-28 13:18:19 +10:00
lsm_audit.c Merge branch 'next' of git://git.infradead.org/users/pcmoore/selinux into next 2015-08-15 13:29:57 +10:00
Makefile LSM: Switch to lists of hooks 2015-05-12 15:00:41 +10:00
min_addr.c
security.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2015-09-08 12:41:25 -07:00