{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2024-21670",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2023-12-29T16:10:20.368Z",
        "datePublished": "2024-01-16T21:44:05.572Z",
        "dateUpdated": "2024-08-01T22:27:35.720Z"
    },
    "containers": {
        "cna": {
            "title": "CL-Signatures Revocation Scheme in Ursa has flaws that allow a holder to demonstrate non-revocation of a revoked credential",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-327",
                            "lang": "en",
                            "description": "CWE-327: Use of a Broken or Risky Cryptographic Algorithm",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "PHYSICAL",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "HIGH",
                        "scope": "CHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4"
                }
            ],
            "affected": [
                {
                    "vendor": "hyperledger-archives",
                    "product": "ursa",
                    "versions": [
                        {
                            "version": "<= 0.3.7",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2024-01-16T21:44:05.572Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Ursa is a cryptographic library for use with blockchains. The revocation schema that is part of the Ursa CL-Signatures implementations has a flaw that could impact the privacy guarantees defined by the AnonCreds verifiable credential model, allowing a malicious holder of a revoked credential to generate a valid Non-Revocation Proof for that credential as part of an AnonCreds presentation. A verifier may verify a credential from a holder as being \"not revoked\" when in fact, the holder's credential has been revoked. Ursa has moved to end-of-life status and no fix is expected."
                }
            ],
            "source": {
                "advisory": "GHSA-r78f-4q2q-hvv4",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "title": "CISA ADP Vulnrichment",
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2024-21670",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2024-05-20T20:46:39.280934Z"
                            }
                        }
                    }
                ],
                "affected": [
                    {
                        "cpes": [
                            "cpe:2.3:a:hyperledger:ursa:*:*:*:*:*:*:*:*"
                        ],
                        "vendor": "hyperledger",
                        "product": "ursa",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "0",
                                "versionType": "custom",
                                "lessThanOrEqual": "0.3.7"
                            }
                        ],
                        "defaultStatus": "unknown"
                    }
                ],
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2024-06-04T17:37:45.919Z"
                }
            },
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-01T22:27:35.720Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "name": "https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4",
                        "tags": [
                            "x_refsource_CONFIRM",
                            "x_transferred"
                        ],
                        "url": "https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-r78f-4q2q-hvv4"
                    }
                ]
            }
        ]
    }
}