CVE-2023-6841: Keycloak: amount of attributes per object is not limited and it may lead to dos
First published: Fri Dec 15 2023(Updated: )
A denial of service vulnerability was found in keycloak where the amount of attributes per object is not limited, an attacker by sending repeated HTTP requests could cause a resource exhaustion when the application send back rows with long attribute values. The issue is fixed in Keycloak 24 with the introduction of the User Profile feature.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| maven/org.keycloak:keycloak-core | <24.0.0 | 24.0.0 |
| Red Hat Keycloak | ||
| redhat single sign-on | =7.0 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2254714
- https://access.redhat.com/security/cve/CVE-2023-6841
- https://nvd.nist.gov/vuln/detail/CVE-2023-6841
- https://github.com/advisories/GHSA-w97f-w3hq-36g2 (Advisory)
- https://github.com/keycloak/keycloak/issues/32837
- https://github.com/keycloak/keycloak/releases/tag/24.0.0
Frequently Asked Questions
What is the severity of CVE-2023-6841?
CVE-2023-6841 is classified as a denial of service vulnerability that can lead to resource exhaustion.
How do I fix CVE-2023-6841?
To resolve CVE-2023-6841, you should upgrade to Keycloak version 24.0.0 or later.
What systems are affected by CVE-2023-6841?
CVE-2023-6841 affects Keycloak version prior to 24.0.0 and Red Hat Single Sign-On version 7.0.
What actions can an attacker take with CVE-2023-6841?
An attacker can exploit CVE-2023-6841 by sending repeated HTTP requests, potentially causing a denial of service.
Is there a workaround for CVE-2023-6841?
Currently, there are no known effective workarounds for CVE-2023-6841, so upgrading is recommended.
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