CVE-2024-9666— Org.keycloak/keycloak-quarkus-server: keycloak proxy header handling denial-of-service (dos) vulnerability
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I. Basic Information for CVE-2024-9666
Vulnerability Information
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Vulnerability Title
Org.keycloak/keycloak-quarkus-server: keycloak proxy header handling denial-of-service (dos) vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Red Hat Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Keycloak是美国红帽（Red Hat）公司的一套为现代应用和服务提供身份验证和管理功能的软件。 Red Hat Keycloak存在安全漏洞，该漏洞源于容易受到拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 24 | 24.0.9-1 ~ * | cpe:/a:redhat:build_keycloak:24::el9 | |
| Red Hat | Red Hat build of Keycloak 24 | 24-18 ~ * | cpe:/a:redhat:build_keycloak:24::el9 | |
| Red Hat | Red Hat build of Keycloak 24 | 24-18 ~ * | cpe:/a:redhat:build_keycloak:24::el9 | |
| Red Hat | Red Hat build of Keycloak 24.0.9 | - | cpe:/a:redhat:build_keycloak:24 | |
| Red Hat | Red Hat build of Keycloak 26.0 | 26.0.6-2 ~ * | cpe:/a:redhat:build_keycloak:26.0::el9 | |
| Red Hat | Red Hat build of Keycloak 26.0 | 26.0-5 ~ * | cpe:/a:redhat:build_keycloak:26.0::el9 | |
| Red Hat | Red Hat build of Keycloak 26.0 | 26.0-6 ~ * | cpe:/a:redhat:build_keycloak:26.0::el9 | |
| Red Hat | Red Hat build of Keycloak 26.0.6 | - | cpe:/a:redhat:build_keycloak:26 | |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | - | cpe:/a:redhat:jboss_enterprise_application_platform:8 |
II. Public POCs for CVE-2024-9666
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|---|
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IV. Related Vulnerabilities
Same weakness: CWE-444
- CVE-2026-40562
Gazelle versions through 0.49 for Perl allows HTTP Request S - CVE-2026-40561
Starlet versions through 0.31 for Perl allows HTTP Request S - CVE-2026-39805
CL.CL HTTP request smuggling via duplicate Content-Length in - CVE-2026-40560
Starman versions before 0.4018 for Perl allows HTTP Request - CVE-2026-41873
Pony Mail: Admin account takeover via request smuggling
V. Comments for CVE-2024-9666
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