github - ghsa-6698-mhxx-r84g

GHSA-6698-MHXX-R84G

Vulnerability from github – Published: 2024-01-16 21:13 – Updated: 2024-01-19 19:28

Summary

Ursa CL-Signatures Revocation allows verifiers to generate unique identifiers for holders

Details

Summary

The revocation scheme 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. Notably, a malicious verifier may be able to generate a unique identifier for a holder providing a verifiable presentation that includes a Non-Revocation proof.

Details

The revocation scheme 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, potentially allowing a malicious verifier to generate a unique identifier for a holder that provides a verifiable presentation that includes a Non-Revocation proof.

The flaws affects all CL-Signature versions published from the Hyperledger Ursa repository to the Ursa Rust Crate, and is fixed in all versions published from the Hyperledger AnonCreds CL-Signatures repository to the AnonCreds CL-Signatures Rust Crate.

The addressing the flaw requires updating AnonCreds holder software (such as mobile wallets) to a corrected CL-Signature implementation, such as the [AnonCreds CL Signatures Rust Crate]. Verifying presentations from corrected holders requires a updating the verifier software to a corrected CL-Signatures implementation. An updated verifier based on AnonCreds CL-Signatures can verify presentations from holders built on either the flawed Ursa CL-Signature implementation or a corrected CL-Signature implementation

The flaw occurs as a result of generating a verifiable presentation that includes a Non-Revocation proof from a flawed implementation.

Impact

The impact of the flaw is that a malicious verifier may be able to determine a unique identifier for a holder presenting a Non-Revocation proof.

Mitigation

Upgrade libraries/holder applications that generate AnonCreds verifiable presentations using the Ursa Rust Crate to any version of the AnonCreds CL-Signatures Rust Crate.

Severity ?

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "ursa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.3.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "anoncreds-clsignatures"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-22192"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-327"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-01-16T21:13:40Z",
    "nvd_published_at": "2024-01-16T22:15:46Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nThe revocation scheme 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. Notably, a malicious verifier may be able to generate a unique identifier for a holder providing a verifiable presentation that includes a Non-Revocation proof.\n\n### Details\n\nThe revocation scheme 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, potentially allowing a malicious verifier to generate a unique identifier for a holder that provides a verifiable presentation that includes a Non-Revocation proof.\n\nThe flaws affects all CL-Signature versions published from the [Hyperledger Ursa] repository to the [Ursa Rust Crate], and is fixed in all versions published from the [Hyperledger AnonCreds CL-Signatures] repository to the [AnonCreds CL-Signatures Rust Crate].\n\nThe addressing the flaw requires updating AnonCreds holder software (such as mobile wallets) to a corrected CL-Signature implementation, such as the [AnonCreds CL Signatures Rust Crate]. Verifying presentations from corrected holders requires a updating the verifier software to a corrected CL-Signatures implementation. An updated verifier based on AnonCreds CL-Signatures can verify presentations from holders built on either the flawed Ursa CL-Signature implementation or a corrected CL-Signature implementation\n\n[Hyperledger Ursa]: https://github.com/hyperledger-archives/ursa\n[Ursa Rust Crate]: https://crates.io/crates/ursa\n[Hyperledger AnonCreds CL-Signatures]: https://github.com/hyperledger/anoncreds-clsignatures-rs\n[AnonCreds CL-Signatures Rust Crate]: https://crates.io/crates/anoncreds-clsignatures\n\nThe flaw occurs as a result of generating a verifiable presentation that includes a Non-Revocation proof from a flawed implementation.\n\n### Impact\nThe impact of the flaw is that a malicious verifier may be able to determine a unique identifier for a holder presenting a Non-Revocation proof.\n\n### Mitigation\n\nUpgrade libraries/holder applications that generate AnonCreds verifiable presentations using the [Ursa Rust Crate] to any version of the [AnonCreds CL-Signatures Rust Crate].",
  "id": "GHSA-6698-mhxx-r84g",
  "modified": "2024-01-19T19:28:25Z",
  "published": "2024-01-16T21:13:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/hyperledger-archives/ursa/security/advisories/GHSA-6698-mhxx-r84g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-22192"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hyperledger/anoncreds-clsignatures-rs/commit/1e55780c890b027fa51e361e188a7743a0bf473f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hyperledger-archives/ursa"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Ursa CL-Signatures Revocation allows verifiers to generate unique identifiers for holders"
}

CVE-2024-22192 (GCVE-0-2024-22192)

Vulnerability from cvelistv5 – Published: 2024-01-16 21:44 – Updated: 2025-06-16 19:46

Title

Ursa CL-Signatures Revocation allows verifiers to generate unique identifiers for holders

Summary

Ursa is a cryptographic library for use with blockchains. The revocation scheme 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. Notably, a malicious verifier may be able to generate a unique identifier for a holder providing a verifiable presentation that includes a Non-Revocation proof. The impact of the flaw is that a malicious verifier may be able to determine a unique identifier for a holder presenting a Non-Revocation proof. Ursa has moved to end-of-life status and no fix is expected.

Severity ?

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CWE

CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

Assigner

GitHub_M

References

URL

Tags

https://github.com/hyperledger-archives/ursa/secu…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	hyperledger-archives	ursa	Affected: <= 0.3.7

Show details on NVD website

JSON

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                "id": "CVE-2024-22192",
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      "metrics": [
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            "confidentialityImpact": "HIGH",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-6698-MHXX-R84G

Summary

Details

Impact

Mitigation

CVE-2024-22192 (GCVE-0-2024-22192)

Tags

Sightings

Nomenclature