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Security Advisories: GSA_kwCzR0hTQS1qZnhtLXc4ZzItNHJjds36jg

Cisco node-jose improper validation of JWT signature

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.

Permalink: https://github.com/advisories/GHSA-jfxm-w8g2-4rcv
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1qZnhtLXc4ZzItNHJjds36jg
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: almost 2 years ago
Updated: 7 months ago

CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Identifiers: GHSA-jfxm-w8g2-4rcv, CVE-2018-0114
References:

• https://nvd.nist.gov/vuln/detail/CVE-2018-0114
• https://github.com/cisco/node-jose/blob/master/CHANGELOG.md
• https://github.com/zi0Black/POC-CVE-2018-0114
• https://tools.cisco.com/security/center/viewAlert.x?alertId=56326
• https://www.exploit-db.com/exploits/44324/
• https://web.archive.org/web/20210124130907/http://www.securityfocus.com/bid/102445
• https://github.com/advisories/GHSA-jfxm-w8g2-4rcv

Repository: https://github.com/cisco/node-jose
Blast Radius: 25.7

Affected Packages