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.

• CWE-347
• CWE-347

• http://www.securityfocus.com/bid/102445Third Party Advisory, VDB Entry
• https://github.com/cisco/node-jose/blob/master/CHANGELOG.mdRelease Notes, Third Party Advisory
• https://github.com/zi0Black/POC-CVE-2018-0114Exploit, Third Party Advisory
• https://tools.cisco.com/security/center/viewAlert.x?alertId=56326Patch, Vendor Advisory
• https://www.exploit-db.com/exploits/44324/Third Party Advisory, VDB Entry
• http://www.securityfocus.com/bid/102445Third Party Advisory, VDB Entry
• https://github.com/cisco/node-jose/blob/master/CHANGELOG.mdRelease Notes, Third Party Advisory
• https://github.com/zi0Black/POC-CVE-2018-0114Exploit, Third Party Advisory
• https://tools.cisco.com/security/center/viewAlert.x?alertId=56326Patch, Vendor Advisory
• https://www.exploit-db.com/exploits/44324/Third Party Advisory, VDB Entry

Published

Jan 4, 2018

Last Modified

Jun 17, 2026

Status

Modified