diff options
| author | Ryan Ware <ware@linux.intel.com> | 2016-02-12 02:58:44 +0300 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2016-02-12 10:36:47 +0300 |
| commit | 613317bd212c585c20796c10afe5daaa95d4b0a1 (patch) | |
| tree | 6bee35907a40edcb437683c4b33f2ee655091a66 /security/integrity/evm/evm.h | |
| parent | c05235d50f681bf685e7290cae05ab3b4fa493f3 (diff) | |
| download | linux-613317bd212c585c20796c10afe5daaa95d4b0a1.tar.xz | |
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>
Diffstat (limited to 'security/integrity/evm/evm.h')
0 files changed, 0 insertions, 0 deletions