Description
A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Samba | Fixed in samba 4.13.12, samba 4.14.8 | — |
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 | heimdal | 7.7.0+dfsg-3 | — |
| Debian 14 | samba | 2:4.13.13+dfsg-1 | — |
| Debian 13 | heimdal | 7.7.0+dfsg-3 | — |
| Debian 13 | samba | 2:4.13.13+dfsg-1 | — |
| Debian 12 | heimdal | 7.7.0+dfsg-3 | — |
| Debian 12 | samba | 2:4.13.13+dfsg-1 | — |
| Debian 11 | heimdal | 7.7.0+dfsg-2+deb11u2 | DSA-5287-1 |
| Debian 10 | heimdal | 7.5.0+dfsg-3+deb10u1 | DLA-3206-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | samba | 2:4.13.14+dfsg-0ubuntu1 | — |
| Ubuntu 20.04 LTS | heimdal | 7.7.0+dfsg-1ubuntu1.1 | USN-5675-1 |
| Ubuntu 20.04 LTS | samba | 2:4.13.14+dfsg-0ubuntu0.20.04.1 | USN-5142-1 |
| Ubuntu 18.04 LTS | heimdal | 7.5.0+dfsg-1ubuntu0.1 | USN-5675-1 |
| Ubuntu 18.04 LTS | samba | 2:4.7.6+dfsg~ubuntu-0ubuntu2.26 | USN-5174-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | heimdal | 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 | USN-5675-1 |
| Ubuntu Pro 16.04 LTS | samba | No fix yet | — |
| Ubuntu Pro 14.04 LTS | heimdal | 1.6~git20131207+dfsg-1ubuntu1.2+esm1 | USN-5675-1 |
| Ubuntu Pro 14.04 LTS | samba | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP4 | libheimdal | 7.8.0-bp154.2.4.1 | openSUSE-SU-2023:0019-1 |
| SUSE Package Hub 15 SP3 | libheimdal | 7.8.0-bp153.2.4.1 | openSUSE-SU-2023:0020-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | libheimdal | 7.8.0-bp154.2.4.1 | openSUSE-SU-2023:0019-1 |
| openSUSE Leap 15.3 | libheimdal | 7.8.0-bp153.2.4.1 | openSUSE-SU-2023:0020-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | heimdal | 7.7.1-r0 | — |
| Alpine v3.24 | samba | 4.15.0-r0 | — |
| Alpine v3.23 | heimdal | 7.7.1-r0 | — |
| Alpine v3.23 | samba | 4.15.0-r0 | — |
| Alpine v3.22 | heimdal | 7.7.1-r0 | — |
| Alpine v3.22 | samba | 4.15.0-r0 | — |
| Alpine v3.21 | heimdal | 7.7.1-r0 | — |
| Alpine v3.21 | samba | 4.15.0-r0 | — |
| Alpine v3.20 | heimdal | 7.7.1-r0 | — |
| Alpine v3.20 | samba | 4.15.0-r0 | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | heimdal | 7.7.1-r0 | — |
| Alpine v3.19 | samba | 4.15.0-r0 | — |
| Alpine v3.18 | heimdal | 7.7.1-r0 | — |
| Alpine v3.18 | samba | 4.15.0-r0 | — |
| Alpine v3.17 | heimdal | 7.7.1-r0 | — |
| Alpine v3.17 | samba | 4.15.0-r0 | — |
| Alpine v3.16 | heimdal | 7.7.1-r0 | — |
| Alpine v3.16 | samba | 4.15.0-r0 | — |
| Alpine v3.15 | heimdal | 7.7.1-r0 | — |
| Alpine v3.15 | samba | 4.15.0-r0 | — |
| Alpine v3.14 | heimdal | 7.7.1-r0 | — |
| Alpine v3.14 | samba | 4.14.8-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | samba | 4.18.3-1 | — |
| Azure Linux 2 (CBL-Mariner) | samba | No fix yet | — |
Advisories 9
- USN-5675-1 heimdal vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- USN-5142-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5174-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5287-1 heimdal - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3206-1 heimdal - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2023:0019-1 Security update for libheimdal SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2023:0020-1 Security update for libheimdal SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-2372 genua genugate: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 19, 2023
- WID-SEC-2022-1714 Samba: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 27, 2022
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C
- https://bugzilla.samba.org/show_bug.cgi?id=14770%2C
- https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a
- DSA-5287 vendor-advisory
- [debian-lts-announce] 20221126 [SECURITY] [DLA 3206-1] heimdal security update mailing-list
- https://security.netapp.com/advisory/ntap-20221215-0002/
- https://security.netapp.com/advisory/ntap-20230216-0008/