Vulnerability CVE-2022-31053


Published: 2022-06-13

Description:
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 ?-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.

Type:

CWE-347

(Improper Verification of Cryptographic Signature)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Clever-cloud -> Biscuit-java 
Biscuitsec -> Biscuit-go 
Biscuitsec -> Biscuit-haskell 
Biscuitsec -> Biscuit-auth 

 References:
https://github.com/biscuit-auth/biscuit/security/advisories/GHSA-75rw-34q6-72cr
https://eprint.iacr.org/2020/1484

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