CVE-2024-42350 Information

Description

Biscuit is an authorization token with decentralized verification offline attenuation and strong security policy enforcement based on a logic language. 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: 1. the public key of the previous block (used in the signature) 2. 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. Tokens with third-party blocks containing trusted annotations generated through a third party block request. This has been addressed in version 4 of the specification. Users are advised to update their implementations to conform. There are no known workarounds for this vulnerability.

Reference

https://github.com/biscuit-auth/biscuit/security/advisories/GHSA-rgqv-mwc3-c78m https://github.com/biscuit-auth/biscuit/commit/c87cbb5d778964d6574df3e9e6579567cad12fff