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ipsec: fix AES CBC IV generation (CVE-2022-46397) 44/38144/1 stable/1904
authorBenoît Ganne <[email protected]>
Tue, 18 Jan 2022 14:56:41 +0000 (15:56 +0100)
committerBenoît Ganne <[email protected]>
Mon, 6 Feb 2023 15:27:55 +0000 (16:27 +0100)
commit70fc5aff89103acaa5768522e45497134b48a982
tree217b84b8f04dd34b0e993c262789389356a98e00tree | snapshot
parente88582facad678701457fa68cbe4ed24f6ec4266commit | 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 <[email protected]>
src/vnet/ipsec/esp_encrypt.c diff | blob | history
src/vnet/ipsec/ipsec_sa.h diff | blob | history
Vector Packet Processing