CVE-2023-1664

Description

A flaw was found in Keycloak. This flaw depends on a non-default configuration "Revalidate Client Certificate" to be enabled and the reverse proxy is not validating the certificate before Keycloak. Using this method an attacker may choose the certificate which will be validated by the server. If this happens and the KC_SPI_TRUSTSTORE_FILE_FILE variable is missing/misconfigured, any trustfile may be accepted with the logging information of "Cannot validate client certificate trust: Truststore not available". This may not impact availability as the attacker would have no access to the server, but consumer applications Integrity or Confidentiality may be impacted considering a possible access to them. Considering the environment is correctly set to use "Revalidate Client Certificate" this flaw is avoidable.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.20%
Vendor Advisory redhat.com
Affected: n/a Keycloak
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2182196&comment#0 issue tracking vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-1664?
CVE-2023-1664 has been scored as a medium severity vulnerability.
How to fix CVE-2023-1664?
To fix CVE-2023-1664, 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-2023-1664 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-1664 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.
What software or system is affected by CVE-2023-1664?
CVE-2023-1664 affects n/a Keycloak.
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