CVE-2023-1732 (GCVE-0-2023-1732)

Vulnerability from cvelistv5 – Published: 2023-05-10 11:41 – Updated: 2025-01-27 18:32
VLAI
Title
Improper random reading in CIRCL
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-27 18:32 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-755 - Improper Handling of Exceptional Conditions
Assigner
cloudflare CNA under the mitre root
CNA scorecard – unranked: 8 records in the last 180 days, 10 needed details
References
Impacted products
Vendor Product Version CPE status
Cloudflare CIRCL Affected: 0 , < <1.3.3 (semver)
guessed Create a notification for this product.
Credits
Tom Thorogood
Show details on NVD website
To clipboard 

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