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WS-2019-0299

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Date: October 23, 2019

chacha20' before v0.2.3 allow generation of keystreams that are larger than ChaCha20's max blocks (~256GB of blocks ). This duplicates the keystream with failure modes similar to nonce reuse.

Language: C++

Severity Score

Weakness Type (CWE)

Generation of Weak Initialization Vector (IV)

CWE-1204

Top Fix

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Upgrade to version chacha20-v0.2.3

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