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linux/security/integrity
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Ryan Ware 50e2fe0e98 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>
Cc: Moritz Muehlenhoff <jmm@inutil.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
History 2016-02-16 10:55:28 +00:00
..
evm EVM: Use crypto_memneq() for digest comparisons 2016-02-16 10:55:28 +00:00
ima ima: extend "mask" policy matching support 2015-08-27 15:06:54 +01:00
digsig.c Revert "ima: define '_ima' as a builtin 'trusted' keyring" 2013-11-23 16:36:35 -08:00
digsig_asymmetric.c ima: read and use signature hash algorithm 2013-10-25 17:16:59 -04:00
iint.c integrity: fix checkpatch errors 2014-03-07 12:15:45 -05:00
integrity.h ima: check xattr value length and type in the ima_inode_setxattr() 2014-11-13 11:48:50 +00:00
integrity_audit.c Merge git://git.infradead.org/users/eparis/audit 2014-04-12 12:38:53 -07:00
Kconfig integrity: move integrity_audit_msg() 2013-06-20 07:47:49 -04:00
Makefile security: cleanup Makefiles to use standard syntax for specifying sub-directories 2014-02-17 11:08:04 +11:00