CVE-2024-9666
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
24/100
Published: 2024-11-25
Modified: 2026-11-03
First seen: 2026-11-03
Status: active
Attack Surface
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
High
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
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.
Weakness Classification (1)
References & Advisories (6)
vendor-advisory
x_refsource_REDHAT
vendor-advisory
x_refsource_REDHAT
vendor-advisory
x_refsource_REDHAT
vendor-advisory
x_refsource_REDHAT
vdb-entry
x_refsource_REDHAT
issue-tracking
x_refsource_REDHAT