HMAC-BLAKE2 final discards message when key length exceeds block size
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| wolfSSL | wolfSSL | unaffected |
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No data.
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| Wolfssl | Wolfssl |
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No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.158% probability within 30 days)
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ssvc
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| First Time appeared |
Wolfssl
Wolfssl wolfssl |
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| Vendors & Products |
Wolfssl
Wolfssl wolfssl |
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| Description | wc_Blake2bHmacFinal and wc_Blake2sHmacFinal discard the message when the key length exceeds the block size, producing a MAC that is independent of the input. When the supplied key is longer than the BLAKE2 block size the key-hashing branch reinitialized the running hash state, discarding the accumulated message data, so the resulting MAC depended only on the key and not on the message being authenticated. This bug is specific to the HMAC-BLAKE2 APIs that were added in wolfSSL version 5.9.0. | |
| Title | HMAC-BLAKE2 final discards message when key length exceeds block size | |
| Weaknesses | CWE-354 | |
| References |
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| Metrics |
cvssV4_0
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