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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
..
apparmor apparmor: clarify CRYPTO dependency 2015-10-22 11:11:28 +11:00
integrity EVM: Use crypto_memneq() for digest comparisons 2016-02-12 18:36:47 +11:00
keys KEYS: Only apply KEY_FLAG_KEEP to a key if a parent keyring has it set 2016-01-28 10:48:40 +11:00
selinux selinux: nlmsgtab: add SOCK_DESTROY to the netlink mapping tables 2016-02-09 04:55:05 -05:00
smack security: let security modules use PTRACE_MODE_* with bitmasks 2016-01-20 17:09:18 -08:00
tomoyo convert a bunch of open-coded instances of memdup_user_nul() 2016-01-04 10:26:58 -05:00
yama security: let security modules use PTRACE_MODE_* with bitmasks 2016-01-20 17:09:18 -08:00
Kconfig Yama: remove needless CONFIG_SECURITY_YAMA_STACKED 2015-07-28 13:18:19 +10:00
Makefile LSM: Switch to lists of hooks 2015-05-12 15:00:41 +10:00
commoncap.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-01-20 17:09:18 -08:00
device_cgroup.c security/device_cgroup: Fix RCU_LOCKDEP_WARN() condition 2015-09-03 18:13:10 -07:00
inode.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
lsm_audit.c Merge branch 'next' of git://git.infradead.org/users/pcmoore/selinux into next 2015-08-15 13:29:57 +10:00
min_addr.c mmap_min_addr check CAP_SYS_RAWIO only for write 2010-04-23 08:56:31 +10:00
security.c security: Add hook to invalidate inode security labels 2015-12-24 11:09:40 -05:00