Security | |
* Fix a local timing side channel vulnerability in (D)TLS record decryption | |
when using a CBC ciphersuites without the Encrypt-then-Mac extension. In | |
those circumstances, a local attacker able to observe the state of the | |
cache could use well-chosen functions to measure the exact computation | |
time of the HMAC, and follow up with the usual range of Lucky 13 attacks, | |
including plaintext recovery and key recovery. Found and reported by Tuba | |
Yavuz, Farhaan Fowze, Ken (Yihan) Bai, Grant Hernandez, and Kevin Butler | |
(University of Florida) and Dave Tian (Purdue University). |