Description
The check_rpcsec_auth function in kadmin/server/kadm_rpc_svc.c in kadmind in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 allows remote authenticated users to bypass a kadmin/* authorization check and obtain administrative access by leveraging access to a two-component principal with an initial "kadmind" substring, as demonstrated by a "ka/x" principal.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | krb5 | 1.12.1+dfsg-17 | — |
| Debian 13 | krb5 | 1.12.1+dfsg-17 | — |
| Debian 12 | krb5 | 1.12.1+dfsg-17 | — |
| Debian 7 | krb5 | 1.10.1+dfsg-5+deb7u3 | DSA-3153-1 |
| Debian 6.0 | krb5 | 1.8.3+dfsg-4squeeze9 | DLA-146-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | krb5 | 1.12+dfsg-2ubuntu5.1 | USN-2498-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | krb5 +6 | 1.12.2-14.el7 | RHSA-2015:0439 |
| RHEL 6 | krb5 +6 | 1.10.3-37.el6_6 | RHSA-2015:0794 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | krb5 | 1.12.1-9.1 | SUSE-SU-2015:0290-2, SUSE-SU-2015:0290-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | krb5 | 1.12.1-9.1 | SUSE-SU-2015:0290-2, SUSE-SU-2015:0290-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | krb5 | 1.15-1.1 | openSUSE-SU-2024:10004-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | krb5-libs +5 | 1.12.2-14.el7 | ELSA-2015-0439 |
Advisories 9
- RHSA-2015:0794 Red Hat Security Advisory: krb5 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2015:0439 Red Hat Security Advisory: krb5 security, bug fix and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- USN-2498-1 krb5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3153-1 krb5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-146-1 krb5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10004-1 krb5-1.15-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0290-2 Security update for krb5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0290-1 Security update for krb5 SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2015-0439 Moderate: krb5 security, bug fix and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 11, 2015
References
- FEDORA-2015-2347 vendor-advisory
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2015-001.txt
- RHSA-2015:0794 vendor-advisory
- https://github.com/krb5/krb5/commit/6609658db0799053fbef0d7d0aa2f1fd68ef32d8
- FEDORA-2015-2382 vendor-advisory
- DSA-3153 vendor-advisory
- openSUSE-SU-2015:0255 vendor-advisory
- RHSA-2015:0439 vendor-advisory
- SUSE-SU-2015:0290 vendor-advisory
- 72494 vdb-entry
- MDVSA-2015:069 vendor-advisory
- USN-2498-1 vendor-advisory
- SUSE-SU-2015:0257 vendor-advisory
- http://web.mit.edu/kerberos/advisories/2015-001-patch-r113.txt