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CVE-2023-6544— Keycloak: authorization bypass

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 22
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，该漏洞源于用于过滤的硬编码的宽松正则表达式允许主机注册动态客户端。

CVSS 5.4 · Medium EPSS 1.07% · P64

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-6544

Vulnerability Information
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Vulnerability Title
Keycloak: authorization bypass
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
宽松定义的正则表达式
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，该漏洞源于用于过滤的硬编码的宽松正则表达式允许主机注册动态客户端。
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 22 22.0.10-1 ~ * cpe:/a:redhat:build_keycloak:22::el9
Red Hat Red Hat build of Keycloak 22 22-13 ~ * cpe:/a:redhat:build_keycloak:22::el9
Red Hat Red Hat build of Keycloak 22 22-16 ~ * cpe:/a:redhat:build_keycloak:22::el9
Red Hat Red Hat build of Keycloak 22.0.10 - cpe:/a:redhat:build_keycloak:22
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.13-1.redhat_00001.1.el7sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el7
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.13-1.redhat_00001.1.el8sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el8
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.13-1.redhat_00001.1.el9sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el9
Red Hat RHEL-8 based Middleware Containers 7.6-46 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat RHSSO 7.6.8 - cpe:/a:redhat:red_hat_single_sign_on:7.6

II. Public POCs for CVE-2023-6544

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III. Intelligence Information for CVE-2023-6544

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Vendor Advisories for CVE-2023-6544 (8)

IV. Related Vulnerabilities

Same weakness: CWE-625

V. Comments for CVE-2023-6544

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