Ryan Ware 613317bd21 EVM: Use crypto_memneq() for digest comparisons ...

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>
Cc: stable@vger.kernel.org
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>

2016-02-12 18:36:47 +11:00

..

evm_crypto.c

evm: provide a function to set the EVM key from the kernel

2015-12-15 08:53:36 -05:00

evm_main.c

EVM: Use crypto_memneq() for digest comparisons

2016-02-12 18:36:47 +11:00

evm_posix_acl.c

…

evm_secfs.c

evm: provide a function to set the EVM key from the kernel

2015-12-15 08:53:36 -05:00

evm.h

…

Kconfig

evm: EVM_LOAD_X509 depends on EVM

2015-12-15 09:57:21 -05:00

Makefile

…