Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Authentikat-Jwt Project | Authentikat-Jwt | <= 0.4.5 |
References
- https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070PatchThird Party Advisory
- https://github.com/jasongoodwin/authentikat-jwt/issues/12Issue TrackingThird Party Advisory
- https://github.com/jasongoodwin/authentikat-jwt/pull/36Issue TrackingThird Party Advisory
- https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070PatchThird Party Advisory
- https://github.com/jasongoodwin/authentikat-jwt/issues/12Issue TrackingThird Party Advisory
- https://github.com/jasongoodwin/authentikat-jwt/pull/36Issue TrackingThird Party Advisory
FAQ
What is CVE-2017-18239?
CVE-2017-18239 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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) ver...
How severe is CVE-2017-18239?
CVE-2017-18239 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2017-18239?
Check the references section above for vendor advisories and patch information. Affected products include: Authentikat-Jwt Project Authentikat-Jwt.