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12 lines
752 B
Plaintext
12 lines
752 B
Plaintext
Security
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* In (D)TLS record decryption, when using a CBC ciphersuites without the
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Encrypt-then-Mac extension, use constant code flow memory access patterns
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to extract and check the MAC. This is an improvement to the existing
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countermeasure against Lucky 13 attacks. The previous countermeasure was
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effective against network-based attackers, but less so against local
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attackers. The new countermeasure defends against local attackers, even
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if they have access to fine-grained measurements. In particular, this
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fixes a local Lucky 13 cache attack found and reported by Tuba Yavuz,
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Farhaan Fowze, Ken (Yihan) Bai, Grant Hernandez, and Kevin Butler
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(University of Florida) and Dave Tian (Purdue University).
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