CVE-2023-23928 reason-jose ignores signature checks
Attackers can bypass authentication and escalate privileges by tampering with JWS tokens due to missing signature validation in the reason-jose library.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-23928?
CVE-2023-23928 is a medium-severity authentication bypass vulnerability in ulrikstrid reason-jose, published on 1 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
reason-jose is a JOSE implementation in ReasonML and OCaml.`Jose.Jws.validate` does not check HS256 signatures. This allows tampering of JWS header and payload data if the service does not perform additional checks. Such tampering could expose applications using reason-jose to authorization bypass. Applications relying on JWS claims assertion to enforce security boundaries may be vulnerable to privilege escalation. This issue has been patched in version 0.8.2.
Weakness: CWE-347
Which versions are affected by CVE-2023-23928?
It affects 1 product.
Products include Reason-Jose Project Reason-Jose.
How do I fix CVE-2023-23928?
No fix has been published for CVE-2023-23928 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2023-23928 being exploited?
There is no known exploitation of CVE-2023-23928 in the wild and no public exploit code.
Sources
Also known as GHSA-7jj9-6qwv-wpm7.