Home/CVE/Biscuit is an authentication and authorization token for microservices architectures. The Biscuit specification version
CVE

CVE-2022-31053

Biscuit is an authentication and authorization token for microservices architectures. The Biscuit specification version

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.

CRITICAL · CVSS 9.8 EPSS 0.00289
Act now
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-347Improper Verification of Cryptographic Signature
▤

Affected Products & Versions

4
biscuitsec biscuit-auth>= 1.0.0 and <= 1.1.0
biscuitsec biscuit-go< 2.0.0
biscuitsec biscuit-haskellall versions
clever-cloud biscuit-java< 2.0.0
▤

Affected Packages

3
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/biscuit-auth/biscuit-go
Maven com.clever-cloud:biscuit-java CRITICAL fixed in 2.0.0
crates.io biscuit-auth CRITICAL fixed in 2.0.0
⚠

Public Exploits & PoCs

2
poceprint.iacr.org · 1484eprint.iacr.org
pocgithub.com · GHSA-75rw-34q6-72crgithub.com
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Jun 2022 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
total
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