{
  "id": "CVE-2023-1732",
  "sourceIdentifier": "cna@cloudflare.com",
  "published": "2023-05-10T12:15:10.523",
  "lastModified": "2024-11-21T07:39:47.283",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read()\u00a0returns an error. In rare deployment cases (error thrown by the Read()\u00a0function), this could lead to a predictable shared secret.\n\nThe 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.\n\n"
    }
  ],
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        "type": "Secondary",
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          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 4.2
      },
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
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          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
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        "exploitabilityScore": 3.9,
        "impactScore": 4.2
      }
    ]
  },
  "weaknesses": [
    {
      "source": "cna@cloudflare.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-755"
        }
      ]
    },
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-755"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:cloudflare:circl:*:*:*:*:*:go:*:*",
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  "references": [
    {
      "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x",
      "source": "cna@cloudflare.com",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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}