Vulnerability in Cisco Node-Jose
CVE-2018-0114
A vulnerability in the Cisco node-jose open source library before 0.11.0 could allow an unauthenticated, remote attacker to re-sign tokens using a key that is embedded within the token. The vulnerability is due to node-jose following the JSON Web Signature (JWS) standard for JSON Web Tokens (JWTs). This standard specifies that a JSON Web Key (JWK) representing a public key can be embedded within the header of a JWS. This public key is then trusted for verification. An attacker could exploit this by forging valid JWS objects by removing the original signature, adding a new public key to the header, and then signing the object using the (attacker-owned) private key associated with the public key embedded in that JWS header.
EPSS: 0.427 (98.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Cisco Node-jose
- N/a Node-jose Library — versions Node-jose Library
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- psirt@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)
- psirt@cisco.com (x_refsource_CONFIRM, Third Party Advisory, Release Notes)
- psirt@cisco.com (VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
- psirt@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2018-0114?
- CVE-2018-0114 is a high-severity vulnerability in Cisco Node-Jose, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2018-01-04.
- How severe is CVE-2018-0114?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-0114 known to be exploited?
- 44 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.