CVE-2017-18239

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.

9.8

CVSS

Severity: Critical

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.42%

Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com

Affected: n/a n/a

References

Link	Tags
https://github.com/jasongoodwin/authentikat-jwt/commit/2d2fa0d40ac8f2f7aa7e9b070fa1a25eee082cb0	third party advisory patch
https://github.com/jasongoodwin/authentikat-jwt/issues/12	issue tracking third party advisory
https://github.com/jasongoodwin/authentikat-jwt/pull/36	issue tracking third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-18239?: CVE-2017-18239 has been scored as a critical severity vulnerability.
How to fix CVE-2017-18239?: To fix CVE-2017-18239, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-18239 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2017-18239 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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