Description (CNA)
A vulnerability was found in the Keycloak Server. The Keycloak Server is vulnerable to a denial of service (DoS) attack due to improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This issue can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service. The attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Not supplied / Not supplied | affected 0 before 24.0.9; affected 25.0.0 before 26.0.6 |
| Red Hat / Red Hat build of Keycloak 24 | unaffected 24.0.9-1 before * |
| Red Hat / Red Hat build of Keycloak 24 | unaffected 24-18 before * |
| Red Hat / Red Hat build of Keycloak 24 | unaffected 24-18 before * |
| Red Hat / Red Hat build of Keycloak 24.0.9 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0.6-2 before * |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0-5 before * |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0-6 before * |
| Red Hat / Red Hat build of Keycloak 26.0.6 | unaffected |
| Red Hat / Red Hat Build of Keycloak | affected |
| Red Hat / Red Hat JBoss Enterprise Application Platform 8 | unaffected |
CWE
CWE-444
References
- https://access.redhat.com/errata/RHSA-2024:10175
- https://access.redhat.com/errata/RHSA-2024:10176
- https://access.redhat.com/errata/RHSA-2024:10177
- https://access.redhat.com/errata/RHSA-2024:10178
- https://access.redhat.com/security/cve/CVE-2024-9666
- https://bugzilla.redhat.com/show_bug.cgi?id=2317440
ADP enrichment
No English description supplied.
No references supplied.