When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read() returns an error. In rare deployment cases (error thrown by the Read() function), this could lead to a predictable shared secret.
The tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides crypto/rand.Reader, which in the vast majority of cases will always return the right number random bytes. In the cases where it does not, or the user provides a source that does not, the blinding for blindrsa is weak and integrity of the plaintext is not ensured in tkn20.
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History
Mon, 27 Jan 2025 19:15:00 +0000
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Status: PUBLISHED
Assigner: cloudflare
Published:
Updated: 2025-01-27T18:32:25.797Z
Reserved: 2023-03-30T15:16:57.957Z
Link: CVE-2023-1732
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Updated: 2024-08-02T05:57:24.987Z
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Status : Modified
Published: 2023-05-10T12:15:10.523
Modified: 2024-11-21T07:39:47.283
Link: CVE-2023-1732
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