Auth bypass in Auth0 Jsonwebtoken
CVE-2022-23541
jsonwebtoken is an implementation of JSON Web Tokens. Versions `<= 8.5.1` of `jsonwebtoken` library can be misconfigured so that passing a poorly implemented key retrieval function referring to the `secretOrPublicKey` argument from the readme link will result in incorrect verification of tokens. There is a possibility of using a different algorithm and key combination in verification, other than the one that was used to sign the tokens. Specifically, tokens signed with an asymmetric public key could be verified with a symmetric HS256 algorithm. This can lead to successful validation of forged tokens. If your application is supporting usage of both symmetric key and asymmetric key in jwt.verify() implementation with the same key retrieval function. This issue has been patched, please update to version 9.0.0.
Vulnerability class: Broken Authentication
EPSS: 0.008 (52.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Auth0 Jsonwebtoken
- Auth0 Node-jsonwebtoken — versions <= 8.5.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com
Frequently asked questions
- What is CVE-2022-23541?
- CVE-2022-23541 is a medium-severity vulnerability in Auth0 Jsonwebtoken, classified under Improper Authentication. CVSS score: 5.0/10. Published 2022-12-22.
- How severe is CVE-2022-23541?
- Medium severity. CVSS v3 base score is 5.0 out of 10.
- Is CVE-2022-23541 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.