linux/security/integrity/evm
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
..
Kconfig evm: EVM_LOAD_X509 depends on EVM 2015-12-15 09:57:21 -05:00
Makefile evm: posix acls modify i_mode 2011-09-14 15:24:51 -04:00
evm.h evm: enable EVM when X509 certificate is loaded 2015-12-15 08:50:48 -05:00
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 ima: fix script messages 2013-10-25 13:17:19 -04:00
evm_secfs.c evm: provide a function to set the EVM key from the kernel 2015-12-15 08:53:36 -05:00