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CVE-2023-2422— Keycloak: oauth client impersonation

Quick assessment

Affected
Red Hat Red Hat Single Sign-On 7
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，该漏洞源于服务器无法正确验证客户端证书链。

CVSS 5.5 · Medium EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2023-2422

Vulnerability Information
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Vulnerability Title
Keycloak: oauth client impersonation
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. A Keycloak server configured to support mTLS authentication for OAuth/OpenID clients does not properly verify the client certificate chain. A client that possesses a proper certificate can authorize itself as any other client, therefore, access data that belongs to other clients.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Keycloak 信任管理问题漏洞
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，该漏洞源于服务器无法正确验证客户端证书链。
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 Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7.6.4
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.8-1.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 0:18.0.8-1.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 0:18.0.8-1.redhat_00001.1.el9sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el9
Red Hat RHEL-8 based Middleware Containers 7.6-24 ~ * cpe:/a:redhat:rhosemc:1.0::el8

II. Public POCs for CVE-2023-2422

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III. Intelligence Information for CVE-2023-2422

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Vendor Advisories for CVE-2023-2422 (7)

Same Patch Batch · Red Hat · 2023-10-04 · 8 CVEs total

CVE-2023-39191 8.2 HIGH Kernel: ebpf: insufficient stack type checks in dynptr
CVE-2023-4586 7.4 HIGH Hotrod-client: hot rod client does not enable hostname validation when using tls that lea
CVE-2023-3971 7.3 HIGH Controller: html injection in custom login info
CVE-2023-4237 7.3 HIGH Platform: ec2_key module prints out the private key directly to the standard output
CVE-2023-4380 6.3 MEDIUM Platform: token exposed at importing project
CVE-2023-3428 6.2 MEDIUM Imagemagick: heap-buffer-overflow in coders/tiff.c
CVE-2023-3576 5.5 MEDIUM Libtiff: memory leak in tiffcrop.c

IV. Related Vulnerabilities

Same product: Red Hat Single Sign-On 7
Same vendor: Red Hat
Same weakness: CWE-295

V. Comments for CVE-2023-2422

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