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CVE-2024-9666— Org.keycloak/keycloak-quarkus-server: keycloak proxy header handling denial-of-service (dos) vulnerability

Quick assessment

Affected
CVE-2024-9666
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 4.7 · Medium EPSS 0.40% · P32

Affected Version Matrix 12

VendorProduct Version RangeStatus
None None < 24.0.9 affected
25.0.0< 26.0.6 affected
Red Hat Red Hat Build of Keycloak any affected
Red Hat Red Hat build of Keycloak 24 24.0.9-1< * unaffected
24-18< * unaffected
24-18< * unaffected
Red Hat Red Hat build of Keycloak 24.0.9 any unaffected
Red Hat Red Hat build of Keycloak 26.0 26.0.6-2< * unaffected
26.0-5< * unaffected
26.0-6< * unaffected
Red Hat Red Hat build of Keycloak 26.0.6 any unaffected
Red Hat Red Hat JBoss Enterprise Application Platform 8 any unaffected

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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
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
- - 0 ~ 24.0.9 -
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:26.0
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:
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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III. Intelligence Information for CVE-2024-9666

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Vendor Advisories for CVE-2024-9666 (4)

IV. Related Vulnerabilities

Same weakness: CWE-444

V. Comments for CVE-2024-9666

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