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...
- Published
- Jan 4, 2018
- Updated
- Dec 2, 2024
- Assigning CNA
- cisco
- Evidence observed
- Mar 20, 2018
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NModerate · next 30 days
- Percentile
- 98.7%
- Model date
- Oct 13, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
- CVE-2018-0114Exploit
Exploitation of a vulnerability in Cisco's node-jose, a JavaScript library created to manage JWT.
Proof-of-concept exploit for CVE-2018-0114 that generates forged JWT tokens with arbitrary claims, demonstrating a signature validation bypass vulnerability.
- CVE-2018-0114-ExploitExploit
Exploit for CVE-2018-0114: re-signs JWT tokens by embedding an attacker-controlled public key in the JWS header, bypassing authentication in vulnerable Cisco node-jose library versions.
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