Use of Hard-coded Cryptographic Key in cjose - #VU133240

Vulnerability details

The vulnerability allows a remote attacker to disclose plaintext and modify protected content.

The vulnerability exists due to use of a hard-coded cryptographic key in JWE encryption in src/jwe.c when encrypting a JWE with an AES-CBC-HMAC content-encryption algorithm together with a key-management algorithm that generates a fresh CEK. A remote attacker can obtain a produced JWE and decrypt or forge its contents to disclose plaintext and modify protected content.

This affects only JWEs produced by the vulnerable encryption path; the issue does not affect the decryption path.

Affected software

Remediation

External References

• https://github.com/OpenIDC/cjose/security/advisories/GHSA-f6wf-pqg3-6wqq
• https://github.com/OpenIDC/cjose/commit/2a6e5bd969fa20059fb00913fb9f57d77ea6a4d9

Related Security Bulletins

• Use of Hard-coded Cryptographic Key in cjose