PT-2024-29887 · Biscuit · Biscuit

Geal · Published 2024-07-31 · Updated 2025-11-14 · CVE-2024-42350

Positive Technologies (AI Summary)

CVSS v3.1

3.0

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions Biscuit versions prior to 4

Description The issue concerns the generation of third-party blocks in Biscuit, an authorization token with decentralized verification. A malicious user can forge a ThirdPartyBlock request, tricking the third-party authority into generating datalog that trusts the wrong keypair. This can be achieved by altering the publicKeys field in the ThirdPartyBlockRequest and replacing the actual public key with a different one, allowing the attacker to use the token without obtaining a third-party block from the intended authority.

Recommendations For versions prior to 4, update the implementation to conform to version 4 of the specification to address this issue. At the moment, there is no information about other versions that contain a fix for this vulnerability.

Exploit

Fix

Exposure of Resource to Wrong Sphere

Improper Privilege Management

Weakness Enumeration

CWE-668

CWE-269

Related Identifiers

CVE-2024-42350

GHSA-47CQ-PC2V-3RMP

GHSA-P9W4-585H-G3C7

GHSA-RGQV-MWC3-C78M

HSEC-2024-0009

Affected Products

Biscuit

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42350.json · Exploit
• https://osv.dev/vulnerability/CVE-2024-42350 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-41949 · Security Note
• https://osv.dev/vulnerability/GHSA-p9w4-585h-g3c7 · Vendor Advisory
• https://osv.dev/vulnerability/HSEC-2024-0009 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-42350 · Security Note
• https://github.com/biscuit-auth/biscuit/security/advisories/GHSA-rgqv-mwc3-c78m · Note
• https://github.com/biscuit-auth/biscuit/commit/c87cbb5d778964d6574df3e9e6579567cad12fff · Note
• https://github.com/biscuit-auth/biscuit-rust/security/advisories/GHSA-p9w4-585h-g3c7 · Note
• https://github.com/biscuit-auth/biscuit-rust · Note
• https://github.com/haskell/security-advisories · Note
• https://github.com/biscuit-auth/biscuit-haskell/security/advisories/GHSA-47cq-pc2v-3rmp · Note
• https://github.com/biscuit-auth/biscuit-haskell/pull/93 · Note
• https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export · Note
• https://haskell.github.io/security-advisories · Note