GSD-2023-1732

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
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.
Aliases
Aliases
CVE-2023-1732
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{
  "GSD": {
    "alias": "CVE-2023-1732",
    "id": "GSD-2023-1732"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-1732"
      ],
      "details": "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",
      "id": "GSD-2023-1732",
      "modified": "2023-12-13T01:20:41.145599Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cna@cloudflare.com",
        "ID": "CVE-2023-1732",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "CIRCL",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "0",
                          "version_value": "\u003c1.3.3"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Cloudflare"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "Tom Thorogood"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "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"
          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.1.0-dev"
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-20",
                "lang": "eng",
                "value": "CWE-20 Improper Input Validation"
              }
            ]
          },
          {
            "description": [
              {
                "cweId": "CWE-755",
                "lang": "eng",
                "value": "CWE-755 Improper Handling of Exceptional Conditions"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x",
            "refsource": "MISC",
            "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x"
          }
        ]
      },
      "source": {
        "discovery": "EXTERNAL"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003cv1.3.3",
          "affected_versions": "All versions before 1.3.3",
          "cwe_ids": [
            "CWE-1035",
            "CWE-937"
          ],
          "date": "2023-05-11",
          "description": "When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, does 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 does 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",
          "fixed_versions": [
            "v1.3.3"
          ],
          "identifier": "CVE-2023-1732",
          "identifiers": [
            "GHSA-2q89-485c-9j2x",
            "CVE-2023-1732"
          ],
          "not_impacted": "All versions starting from 1.3.3",
          "package_slug": "go/github.com/cloudflare/circl",
          "pubdate": "2023-05-11",
          "solution": "Upgrade to version 1.3.3 or above.",
          "title": "Improper random reading in CIRCL",
          "urls": [
            "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x",
            "https://nvd.nist.gov/vuln/detail/CVE-2023-1732",
            "https://github.com/cloudflare/circl/commit/ff8d91225f8954b4970b6d6382d2e4c78f4a4cf8",
            "https://github.com/cloudflare/circl/releases/tag/v1.3.3",
            "https://github.com/advisories/GHSA-2q89-485c-9j2x"
          ],
          "uuid": "bc58b045-60f2-4ddd-9faa-e389a6089651",
          "versions": [
            {
              "commit": {
                "sha": "3bef500f2b925f150815a360b90081021e082939",
                "tags": [
                  "v1.3.3"
                ],
                "timestamp": "20230502104430"
              },
              "number": "v1.3.3"
            }
          ]
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:cloudflare:circl:*:*:*:*:*:go:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.3.3",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "cna@cloudflare.com",
          "ID": "CVE-2023-1732"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "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"
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-755"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x",
              "refsource": "MISC",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 4.2
        }
      },
      "lastModifiedDate": "2023-05-17T17:04Z",
      "publishedDate": "2023-05-10T12:15Z"
    }
  }
}



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