| Name | CVE-2024-2698 |
| 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 (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1077682 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| freeipa (PTS) | buster (security), buster, buster (lts) | 4.7.2-3+deb10u1 | vulnerable |
| bookworm | 4.9.11-1 | vulnerable |
| sid | 4.12.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| freeipa | source | (unstable) | 4.12.2-1 | unimportant | | 1077682 |
Notes
https://bugzilla.redhat.com/show_bug.cgi?id=2270353
https://www.freeipa.org/release-notes/4-12-1.html
https://pagure.io/freeipa/c/3b58080f67eb940023d612aabd30533f1dc9387f
https://pagure.io/freeipa/c/2e1132a90a1d753db95ba2c699e0b18c2fc6f256 (release-4-12-1)
FreeIPA in Debian only builds the client packages, not the server