CVE-2017-18239
9.8 · CRITICALOverview
CVE-2017-18239 is a critical-severity vulnerability affecting authentikat-jwt_project authentikat-jwt. It was published on March 18, 2018 and has a CVSS 3.0 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A time-sensitive equality check on the JWT signature in the JsonWebToken.validate method in main/scala/authentikat/jwt/JsonWebToken.scala in authentikat-jwt (aka com.jason-goodwin/authentikat-jwt) version 0.4.5 and earlier allows the supplier of a JWT token to guess bit after bit of the signature by repeating validation requests.
Remediation
Check the references section for vendor advisories and patches from authentikat-jwt_project. Update authentikat-jwt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| authentikat-jwt_project | authentikat-jwt | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2017-18239?
CVE-2017-18239 is a critical-severity vulnerability affecting authentikat-jwt_project authentikat-jwt. It was published on March 18, 2018 and has a CVSS 3.0 base score of 9.8 (CRITICAL).
How severe is CVE-2017-18239?
This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2017-18239?
Check the references section for vendor advisories and patches from authentikat-jwt_project. Update authentikat-jwt to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2017-18239?
CyberStrike's AI-powered security agents can automatically detect CVE-2017-18239 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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