Improper input validation in Auth0 Jsonwebtoken
CVE-2015-9235
In jsonwebtoken node module before 4.2.2 it is possible for an attacker to bypass verification when a token digitally signed with an asymmetric key (RS/ES family) of algorithms but instead the attacker send a token digitally signed with a symmetric algorithm (HS* family).
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.087 (94.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.087 · newest: 0.087 · change: 0.000
Affected products
- Auth0 Jsonwebtoken
- HackerOne Jsonwebtoken Node Module — versions <4.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- nodesecurity.io/advisories/17 (Third Party Advisory)
- github.com/auth0/node-jsonwebtoken/commit/1bb584bc382295eeb7ee8c4452a673a77a68b… (Patch, Third Party Advisory)
- auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/ (Broken Link, Vendor Advisory)
- www.timmclean.net/2015/02/25/jwt-alg-none.html (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2015-9235?
- CVE-2015-9235 is a critical-severity vulnerability in Auth0 Jsonwebtoken, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2018-05-29.
- How severe is CVE-2015-9235?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2015-9235 known to be exploited?
- 28 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.