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WS-2019-0299
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
Severity Score
Weakness Type (CWE)
Generation of Weak Initialization Vector (IV)
CWE-1204CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | LOCAL |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | REQUIRED |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | HIGH |