High [CVE-2023-6841] Keycloak: amount of attributes per object is not limited and it may lead to dos
This high-severity Red Hat Linux advisory covers CVE-2023-6841 affecting Red Hat Single Sign-On 7.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published
Summary
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. Red Hat has evaluated this vulnerability and it only affects the Red Hat Single Sign-On (RHSSO).
Red Hat severity: Moderate — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-231.
Affected Red Hat products: Red Hat Single Sign-On 7. Red Hat lists Red Hat build of Quarkus; Red Hat Fuse 7; Red Hat Mobile Application Platform 4; Red Hat OpenShift Application Runtimes; Red Hat Process Automation 7; Red Hat support for Spring Boot as not affected.
Red Hat does not currently list a fixing RHSA for this CVE.
Is CVE-2023-6841 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2023-6841 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2023-6841?
The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.
Confirm against the vendor advisory before you patch.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
Mitigation checklist
- This CVE is mitigated by the 'User Profile' functionality, which was introduced in Keycloak 24. This feature introduces additional validation which prevents this vulnerability from being exploited.
Official advisory · high-confidence parse· fetched 5 days ago·verify at source
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