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CVE-2024-2698— Freeipa: delegation rules allow a proxy service to impersonate any user to access another target service

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 8
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 FreeIPA是一个综合安全信息管理解决方案。 FreeIPA 4.11.0版本存在安全漏洞，该漏洞源于缺少授予，导致无论是否符合规则的请求都会被接受。

CVSS 8.8 · High EPSS 0.67% · P52
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I. Basic Information for CVE-2024-2698

Vulnerability Information
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Vulnerability Title
Freeipa: delegation rules allow a proxy service to impersonate any user to access another target service
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in FreeIPA in how the initial implementation of MS-SFU by MIT Kerberos was missing a condition for granting the "forwardable" flag on S4U2Self tickets. Fixing this mistake required adding a special case for the check_allowed_to_delegate() function: If the target service argument is NULL, then it means the KDC is probing for general constrained delegation rules and not checking a specific S4U2Proxy request. In FreeIPA 4.11.0, the behavior of ipadb_match_acl() was modified to match the changes from upstream MIT Kerberos 1.20. However, a mistake resulting in this mechanism applies in cases where the target service argument is set AND where it is unset. This results in S4U2Proxy requests being accepted regardless of whether or not there is a matching service delegation rule.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat FreeIPA 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat FreeIPA是一个综合安全信息管理解决方案。 FreeIPA 4.11.0版本存在安全漏洞，该漏洞源于缺少授予，导致无论是否符合规则的请求都会被接受。
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 Enterprise Linux 8 8100020240528133707.823393f5 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 8080020240530051744.b0a6ceea ~ * cpe:/a:redhat:rhel_eus:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:4.11.0-15.el9_4 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:4.10.1-12.el9_2.2 ~ * cpe:/a:redhat:rhel_eus:9.2::crb
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8

II. Public POCs for CVE-2024-2698

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III. Intelligence Information for CVE-2024-2698

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Vendor Advisories for CVE-2024-2698 (6)

Mailing List Discussions for CVE-2024-2698 (1)

Vendor Pages for CVE-2024-2698 (1)

IV. Related Vulnerabilities

Same weakness: CWE-863