CVE-2024-41948 biscuit-java vulnerable to public key confusion in third party block

2024-08-0122:03:15

CWE-1259

GitHub_M

www.cve.org

biscuit-java

vulnerability

public key confusion

third party block

authentication

authorization

microservices

third-party authority

datalog

token

symbol table

keypair

fix 4.0.0

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

EPSS

Percentile

14.5%

JSON

biscuit-java is the java implementation of Biscuit, an authentication and authorization token for microservices architectures. Third-party blocks can be generated without transferring the whole token to the third-party authority. Instead, a ThirdPartyBlock request can be sent, providing only the necessary info to generate a third-party block and to sign it, which includes the public key of the previous block (used in the signature) and the public keys part of the token symbol table (for public key interning in datalog expressions). A third-part block request forged by a malicious user can trick the third-party authority into generating datalog trusting the wrong keypair. This vulnerability is fixed in 4.0.0.

CNA Affected

[
  {
    "vendor": "biscuit-auth",
    "product": "biscuit-java",
    "versions": [
      {
        "version": ">= 3.0.0, < 4.0.0",
        "status": "affected"
      }
    ]
  }
]