CVE-2022-31021 Unlinkability broken in ursa when verifiers use malicious keys

Ursa is a cryptographic library for use with blockchains. A weakness in the Hyperledger AnonCreds specification that is not mitigated in the Ursa and AnonCreds implementations is that the Issuer does not publish a key correctness proof demonstrating that a generated private key is sufficient to...

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

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...

GHSA-6698-MHXX-R84G Ursa CL-Signatures Revocation allows verifiers to generate unique identifiers for holders

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...

Breaking unlinkability in Identity Mixer using malicious keys

CL Signatures Issuer Key Correctness Proof lacks of prime strength checking A weakness in the Hyperledger AnonCreds specification that is not mitigated in the Ursa and AnonCreds implementations is that the Issuer does not publish a key correctness proof demonstrating that a generated private key ...

PT-2024-19012 · Ursa · Ursa

Name of the Vulnerable Software and Affected Versions: Ursa affected versions not specified Description: The revocation schema in Ursa's CL-Signatures implementations has a flaw that could impact the privacy guarantees defined by the AnonCreds verifiable credential model. This flaw allows a...

Hyperledger Ursa Encryption Issue Vulnerability

Hyperledger Ursa is a Hyperledger open source cryptographic library for use with the blockchain. A cryptographic issue vulnerability exists in Hyperledger Ursa version 0.1.0 that stems from allowing a malicious holder of revoked credentials to generate a valid, non-revoked proof for that credenti...

PT-2024-19265 · Ursa · Ursa

Name of the Vulnerable Software and Affected Versions: Ursa affected versions not specified Description: The revocation scheme in Ursa's CL-Signatures implementations has a flaw that could impact the privacy guarantees defined by the AnonCreds verifiable credential model. A malicious verifier may...