CVE-2022-31053

Public Exploit
Signature forgery in Biscuit

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 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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.07%
Third-Party Advisory iacr.org Third-Party Advisory github.com
Affected: biscuit-auth biscuit
Published at:
Updated at:

References

Link Tags
https://github.com/biscuit-auth/biscuit/security/advisories/GHSA-75rw-34q6-72cr third party advisory exploit
https://eprint.iacr.org/2020/1484 third party advisory exploit technical description

Frequently Asked Questions

What is the severity of CVE-2022-31053?
CVE-2022-31053 has been scored as a critical severity vulnerability.
How to fix CVE-2022-31053?
To fix CVE-2022-31053, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-31053 being actively exploited in the wild?
It is possible that CVE-2022-31053 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-31053?
CVE-2022-31053 affects biscuit-auth biscuit.
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