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10 lines
595 B
Plaintext
10 lines
595 B
Plaintext
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o Major bugfixes (security):
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- Resist a hashtable-based CPU denial-of-service attack against
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relays. Previously we used a naive unkeyed hash function to look up
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circuits in a circuitmux object. An attacker could exploit this to
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construct circuits with chosen circuit IDs in order to try to create
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collisions and make the hash table inefficient. Now we use a SipHash
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construction for this hash table instead. Fixes bug 40391; bugfix on
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0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005.
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Reported by Jann Horn from Google's Project Zero.
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