Vulnerability in Json-Jwt Project
CVE-2018-1000539
Nov json-jwt version >= 0.5.0 && < 1.9.4 contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability in Decryption of AES-GCM encrypted JSON Web Tokens that can result in Attacker can forge a authentication tag. This attack appear to be exploitable via network connectivity. This vulnerability appears to have been fixed in 1.9.4 and later.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/nov/json-jwt/pull/62 (Third Party Advisory)
- www.debian.org/security/2018/dsa-4283 (vendor-advisory)
Frequently asked questions
- What is CVE-2018-1000539?
- CVE-2018-1000539 is a medium-severity vulnerability in Json-Jwt Project, classified under Improper Verification of Cryptographic Signature. CVSS score: 5.3/10. Published 2018-06-26.
- How severe is CVE-2018-1000539?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2018-1000539 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.