---
id: CVE-2024-2698
title: >-
  Freeipa: delegation rules allow a proxy service to impersonate any user to
  access another target service
summary: >-
  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 …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-863
vendor: Red Hat
product: freeipa
affected:
  - freeipa >= 4.11.0 < 4.11.2
  - freeipa >= 4.12.0 < 4.12.1
  - 'idm:DL1 (all versions)'
  - 'idm:DL1 (all versions)'
  - ipa (all versions)
  - ipa (all versions)
  - ipa
  - ipa (all versions)
  - 'idm:client/ipa'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-06-12T13:21:27.045344Z'
published: '2024-06-12'
updated: '2026-11-07'
sourceUpdated: '2026-11-07T13:41:49.445Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-2698'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2024:3754'
    label: 'RHSA-2024:3754'
  - url: 'https://access.redhat.com/errata/RHSA-2024:3755'
    label: 'RHSA-2024:3755'
  - url: 'https://access.redhat.com/errata/RHSA-2024:3757'
    label: 'RHSA-2024:3757'
  - url: 'https://access.redhat.com/errata/RHSA-2024:3759'
    label: 'RHSA-2024:3759'
  - url: 'https://access.redhat.com/security/cve/CVE-2024-2698'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2270353'
    label: RHBZ#2270353
  - url: 'https://www.freeipa.org/release-notes/4-12-1.html'
tags:
  - cve.org
epss: 0.00667
epssPercentile: 0.52138
ingestedAt: '2026-11-07T14:18:21.465Z'
---

## Overview

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.

## Affected

- `freeipa >= 4.11.0 < 4.11.2`
- `freeipa >= 4.12.0 < 4.12.1`
- `idm:DL1 (all versions)`
- `idm:DL1 (all versions)`
- `ipa (all versions)`
- `ipa (all versions)`
- `ipa`
- `ipa (all versions)`
- `idm:client/ipa`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.