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
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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            "orgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
            "shortName": "cloudflare"
          },
          "references": [
            {
              "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Improper random reading in CIRCL",
          "x_generator": {
            "engine": "Vulnogram 0.1.0-dev"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
        "assignerShortName": "cloudflare",
        "cveId": "CVE-2023-1732",
        "datePublished": "2023-05-10T11:41:53.902Z",
        "dateReserved": "2023-03-30T15:16:57.957Z",
        "dateUpdated": "2025-01-27T18:32:25.797Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.