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CVE-2023-6927— Keycloak: open redirect via "form_post.jwt" jarm response mode

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存在输入验证错误漏洞，该漏洞源于可能允许攻击者在JARM响应模式中使用通配符从客户端窃取授权代码或令牌。

CVSS 4.6 · Medium EPSS 1.11% · P65

Possible ATT&CK Techniques 1 AI

T1556 · Modify Authentication Process

Affected Version Matrix 12

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 22 22-7< * unaffected
Red Hat Red Hat build of Keycloak 22.0.8 any unaffected
Red Hat Red Hat Single Sign-On 7 any unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.11-3.redhat_00001.1.el7sso< * unaffected
0:18.0.12-1.redhat_00001.1.el7sso< * unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.11-3.redhat_00001.1.el8sso< * unaffected
0:18.0.12-1.redhat_00001.1.el8sso< * unaffected
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.11-3.redhat_00001.1.el9sso< * unaffected
0:18.0.12-1.redhat_00001.1.el9sso< * unaffected
Red Hat RHEL-8 based Middleware Containers 7.6-39< * unaffected
7.6-41< * unaffected
Red Hat Single Sign-On 7.6.6 any unaffected
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I. Basic Information for CVE-2023-6927

Vulnerability Information
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Vulnerability Title
Keycloak: open redirect via "form_post.jwt" jarm response mode
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Keycloak 输入验证错误漏洞
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存在输入验证错误漏洞，该漏洞源于可能允许攻击者在JARM响应模式中使用通配符从客户端窃取授权代码或令牌。
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 22-7 ~ * cpe:/a:redhat:build_keycloak:22::el9
Red Hat Red Hat build of Keycloak 22.0.8 - cpe:/a:redhat:build_keycloak:22
Red Hat Red Hat Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7.6
Red Hat Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.11-3.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 7 0:18.0.12-1.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 0:18.0.11-3.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 8 0:18.0.12-1.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 0:18.0.11-3.redhat_00001.1.el9sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el9
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.12-1.redhat_00001.1.el9sso ~ * cpe:/a:redhat:red_hat_single_sign_on:7.6::el9
Red Hat RHEL-8 based Middleware Containers 7.6-39 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat RHEL-8 based Middleware Containers 7.6-41 ~ * cpe:/a:redhat:rhosemc:1.0::el8
Red Hat Single Sign-On 7.6.6 - cpe:/a:redhat:red_hat_single_sign_on:7.6

II. Public POCs for CVE-2023-6927

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III. Intelligence Information for CVE-2023-6927

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Vendor Advisories for CVE-2023-6927 (11)

Same Patch Batch · Red Hat · 2023-12-18 · 10 CVEs total

CVE-2023-4320 7.6 HIGH Satellite: arithmetic overflow in satellite
CVE-2023-5384 7.2 HIGH Infinispan: credentials returned from configuration as clear text
CVE-2023-5056 6.8 MEDIUM Skupper-operator: privelege escalation via config map
CVE-2023-3628 6.5 MEDIUM Infispan: rest bulk ops don't check permissions
CVE-2023-5115 6.3 MEDIUM Ansible: malicious role archive can cause ansible-galaxy to overwrite arbitrary files
CVE-2023-5236 4.4 MEDIUM Infinispan: circular reference on marshalling leads to dos
CVE-2023-3629 4.3 MEDIUM Infinispan: non-admins should not be able to get cache config via rest api
CVE-2023-6918 3.7 LOW Libssh: missing checks for return values for digests
CVE-2023-6228 3.3 LOW Libtiff: heap-based buffer overflow in cpstriptotile() in tools/tiffcp.c

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 22
Same vendor: Red Hat
Same weakness: CWE-601

V. Comments for CVE-2023-6927

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