CVE-2024-2698: Freeipa: delegation rules allow a proxy service to impersonate any user to access another target service
First published: Tue Mar 19 2024(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/FreeIPA | <4.11.2 | 4.11.2 |
| redhat/FreeIPA | <4.12.1 | 4.12.1 |
| All of | ||
| Any of | ||
| Freeipa Freeipa | >=4.11.0<4.11.2 | |
| Freeipa Freeipa | =4.12.0 | |
| Any of | ||
| Redhat Enterprise Linux | =6.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| Redhat Enterprise Linux Eus | =8.8 | |
| Redhat Enterprise Linux Eus | =9.2 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://access.redhat.com/errata/RHSA-2024:3754
- https://access.redhat.com/errata/RHSA-2024:3755
- https://access.redhat.com/errata/RHSA-2024:3757
- https://access.redhat.com/errata/RHSA-2024:3759
- https://access.redhat.com/security/cve/CVE-2024-2698
- https://bugzilla.redhat.com/show_bug.cgi?id=2270353
- https://www.freeipa.org/release-notes/4-12-1.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2291165
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WT3JL7JQDIAFKKEFARWYES7GZNWGQNCI/
- agent/softwarecombine
- agent/first-publish-date
- agent/weakness
- agent/title
- agent/type
- agent/description
- agent/author
- agent/severity
- agent/event
- agent/references
- agent/tags
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2024-2698
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/nvd-api
- source/NVD
- package-manager/redhat
- vendor/freeipa
- canonical/freeipa freeipa
- version/freeipa freeipa/4.11.0
- version/freeipa freeipa/4.12.0
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/6.0
- version/redhat enterprise linux/7.0
- version/redhat enterprise linux/8.0
- version/redhat enterprise linux/9.0
- canonical/redhat enterprise linux eus
- version/redhat enterprise linux eus/8.8
- version/redhat enterprise linux eus/9.2