CVE-2018-0114

high-risk
Published 2018-01-04

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.

Do I need to act?

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84.7% chance of exploitation in next 30 days
EPSS score — higher than 15% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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1 public exploit available
44324
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Cisco

References (10)

Third Party Advisory http://www.securityfocus.com/bid/102445
Release Notes https://github.com/cisco/node-jose/blob/master/CHANGELOG.md
Exploit https://github.com/zi0Black/POC-CVE-2018-0114
Patch https://tools.cisco.com/security/center/viewAlert.x?alertId=56326
Third Party Advisory https://www.exploit-db.com/exploits/44324/
Third Party Advisory http://www.securityfocus.com/bid/102445
Release Notes https://github.com/cisco/node-jose/blob/master/CHANGELOG.md
Exploit https://github.com/zi0Black/POC-CVE-2018-0114
Patch https://tools.cisco.com/security/center/viewAlert.x?alertId=56326
Third Party Advisory https://www.exploit-db.com/exploits/44324/
51
/ 100
high-risk
Severity 26/34 · High
Exploitability 20/34 · Moderate
Exposure 5/34 · Minimal