CVE-2023-6927

Keycloak: open redirect via "form_post.jwt" jarm response mode

Description

A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134.

Remediation

Workaround:

  • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Category

4.6
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.56%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat build of Keycloak 22
Affected: Red Hat Red Hat build of Keycloak 22.0.8
Affected: Red Hat Red Hat Single Sign-On 7
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 7
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 7
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 8
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 8
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 9
Affected: Red Hat Red Hat Single Sign-On 7.6 for RHEL 9
Affected: Red Hat RHEL-8 based Middleware Containers
Affected: Red Hat RHEL-8 based Middleware Containers
Affected: Red Hat Single Sign-On 7.6.6
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:0094 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0095 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0096 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0097 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0098 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0100 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0101 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0798 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0799 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0800 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0801 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0804 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-6927 vdb entry vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2255027 vendor advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-6927?
CVE-2023-6927 has been scored as a medium severity vulnerability.
How to fix CVE-2023-6927?
As a workaround for remediating CVE-2023-6927: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Is CVE-2023-6927 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6927 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-6927?
CVE-2023-6927 affects Red Hat Red Hat build of Keycloak 22, Red Hat Red Hat build of Keycloak 22.0.8, Red Hat Red Hat Single Sign-On 7, Red Hat Red Hat Single Sign-On 7.6 for RHEL 7, Red Hat Red Hat Single Sign-On 7.6 for RHEL 7, Red Hat Red Hat Single Sign-On 7.6 for RHEL 8, Red Hat Red Hat Single Sign-On 7.6 for RHEL 8, Red Hat Red Hat Single Sign-On 7.6 for RHEL 9, Red Hat Red Hat Single Sign-On 7.6 for RHEL 9, Red Hat RHEL-8 based Middleware Containers, Red Hat RHEL-8 based Middleware Containers, Red Hat Single Sign-On 7.6.6.
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