CVE-2022-31053 Signature forgery in Biscuit

What is CVE-2022-31053?

CVE-2022-31053 is a critical vulnerability in biscuit-auth biscuit, published on 13 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-347

Which versions are affected by CVE-2022-31053?

8 open source packages ship an affected version, including github.com/biscuit-auth/biscuit-go, biscuit-haskell and com.clever-cloud:biscuit-java. It affects 4 products.

Products include Biscuitsec Biscuit-Auth, Biscuitsec Biscuit-Go, Biscuitsec Biscuit-Haskell, Clever-Cloud Biscuit-Java.

How do I fix CVE-2022-31053?

Upgrade github.com/biscuit-auth/biscuit-go to 2.0.0 or later.

Is CVE-2022-31053 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-31053 exists.

Other vulnerabilities in biscuit-auth biscuit

• CVE-2024-41949 biscuit-rust vulnerable to public key confusion in third party block Low 3.0

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-75rw-34q6-72cr, GO-2022-0564, HSEC-2023-0002.