Vulnerability in Biscuit-Auth Biscuit
CVE-2022-31053
Biscuit is an authentication and authorization token for microservices architectures. The Biscuit specification version 1 contains a vulnerable algorithm that allows malicious actors to forge valid Γ-signatures. Such an attack would allow an attacker to create a token with any access level. The version 2 of the specification mandates a different algorithm than gamma signatures and as such is not affected by this vulnerability. The Biscuit implementations in Rust, Haskell, Go, Java and Javascript all have published versions following the v2 specification. There are no known workarounds for this issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Biscuit-Auth Biscuit — versions biscuit-auth >= 1.0.0, < 2.0.0, biscuit-haskell = 0.1.1.0, com.clever-cloud.biscuit-java < 2.0.0
- Biscuitsec Biscuit-Auth
- Biscuitsec Biscuit-Go
- Biscuitsec Biscuit-Haskell — versions 0.1.1.0
- Clever-Cloud Biscuit-Java
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/biscuit-auth/biscuit/security/advisories/GHSA-75rw-34q6-72cr (Exploit, Third Party Advisory)
- eprint.iacr.org/2020/1484 (Technical Description, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-31053?
- CVE-2022-31053 is a critical-severity vulnerability in Biscuit-Auth Biscuit, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2022-06-13.
- How severe is CVE-2022-31053?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-31053 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.