CVE-2024-9666 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

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

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

4.7