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(parent: 4f7b92f) | patch
ipsec: fix AES CBC IV generation (CVE-2022-46397) 61/38161/1 stable/2009
authorBenoît Ganne <bganne@cisco.com>
Tue, 18 Jan 2022 14:56:41 +0000 (15:56 +0100)
committerBenoît Ganne <bganne@cisco.com>
Tue, 7 Feb 2023 16:21:43 +0000 (17:21 +0100)
commitb6e090c49368bdd7692219a98aad1c997cb592d1
tree62b43de92c2506f35292106a5635b2c937835024tree | snapshot
parent4f7b92f0a0f37ea2875631d7f25d44834abe7af7commit | diff
ipsec: fix AES CBC IV generation (CVE-2022-46397)

For AES-CBC, the IV must be unpredictable (see NIST SP800-38a Appendix
C). Chaining IVs like is done by ipsecmb and native backends for the
VNET_CRYPTO_OP_FLAG_INIT_IV is fully predictable.
Encrypt a counter as part of the message, making the (predictable)
counter-generated IV unpredictable.

Fixes: VPP-2037
Type: fix

Change-Id: If4f192d62bf97dda553e7573331c75efa11822ae
Signed-off-by: Benoît Ganne <bganne@cisco.com>
src/vnet/crypto/crypto.h diff | blob | history
src/vnet/ipsec/esp_encrypt.c diff | blob | history
src/vnet/ipsec/ipsec_sa.h diff | blob | history
Vector Packet Processing