Vulnerability Details : CVE-2018-0114
Public exploit exists!
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.
Products affected by CVE-2018-0114
- cpe:2.3:a:cisco:node-jose:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-0114
83.95%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 99 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-0114
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2018-0114
-
The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by:
- nvd@nist.gov (Primary)
- ykramarz@cisco.com (Secondary)
References for CVE-2018-0114
-
https://tools.cisco.com/security/center/viewAlert.x?alertId=56326
Node-jose Library JSON Web Tokens Re-sign VulnerabilityPatch;Vendor Advisory
-
https://github.com/zi0Black/POC-CVE-2018-0114
GitHub - zi0Black/POC-CVE-2018-0114: This repository contains the POC of an exploit for node-jose < 0.11.0Exploit;Third Party Advisory
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http://www.securityfocus.com/bid/102445
Cisco Node-jose Library CVE-2018-0114 Remote Security Bypass VulnerabilityThird Party Advisory;VDB Entry
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https://www.exploit-db.com/exploits/44324/
Cisco node-jos < 0.11.0 - Re-sign TokensThird Party Advisory;VDB Entry
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https://github.com/cisco/node-jose/blob/master/CHANGELOG.md
node-jose/CHANGELOG.md at master · cisco/node-jose · GitHubRelease Notes;Third Party Advisory
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