CVE-2024-41948 biscuit-java vulnerable to public key confusion in third party block

What is CVE-2024-41948?

CVE-2024-41948 is a low-severity authentication bypass vulnerability in biscuit-auth biscuit-java, published on 1 Aug 2024. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

biscuit-java is the java implementation of Biscuit, an authentication and authorization token for microservices architectures. Third-party blocks can be generated without transferring the whole token to the third-party authority. Instead, a ThirdPartyBlock request can be sent, providing only the necessary info to generate a third-party block and to sign it, which includes the public key of the previous block (used in the signature) and the public keys part of the token symbol table (for public key interning in datalog expressions). A third-part block request forged by a malicious user can trick the third-party authority into generating datalog trusting the wrong keypair. This vulnerability is fixed in 4.0.0.

Weakness: CWE-1259

Which versions are affected by CVE-2024-41948?

2 open source packages ship an affected version, including org.biscuitsec:biscuit. It affects 1 product.

Products include Biscuitsec Biscuit-Java.

How do I fix CVE-2024-41948?

Upgrade org.biscuitsec:biscuit to 4.0.0 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2024-41948 being exploited?

There is no known exploitation of CVE-2024-41948 in the wild and no public exploit code.

Sources

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

Also known as GHSA-5hcj-rwm6-xmw4.