Description
It was found that Samba before versions 4.5.3, 4.4.8, 4.3.13 always requested forwardable tickets when using Kerberos authentication. A service to which Samba authenticated using Kerberos could subsequently use the ticket to impersonate Samba to other services or domain users.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | samba | 4.5.3, 4.4.8, 4.3.13 | — |
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 | samba | 2:4.5.2+dfsg-2 | — |
| Debian 13 | samba | 2:4.5.2+dfsg-2 | — |
| Debian 12 | samba | 2:4.5.2+dfsg-2 | — |
| Debian 8 | samba | 2:4.2.14+dfsg-0+deb8u2 | DSA-3740-1 |
| Debian 7 | samba | 2:3.6.6-6+deb7u11 | DLA-776-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.16.04.3 | USN-3158-1 |
| Ubuntu 14.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.14.04.4 | USN-3158-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | ctdb +25 | 4.4.4-13.el7_3 | RHSA-2017:1265 |
| RHEL 6 | samba +12 | 3.6.23-41.el6 | RHSA-2017:0662 |
| RHEL 6 | samba4 +12 | 4.2.10-9.el6 | RHSA-2017:0744 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Gluster Storage 3 | ctdb +25 | 4.4.6-4.el6rhs | RHSA-2017:0495, RHSA-2017:0494 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | samba | 4.2.4-28.3.1 | SUSE-SU-2016:3272-1, SUSE-SU-2016:3271-1 |
| SLES 12 SP1 | samba | 4.2.4-28.3.1 | SUSE-SU-2016:3272-1 |
| SLES 12 | samba | 4.2.4-18.30.1 | SUSE-SU-2016:3299-1 |
| SLES 11 SP4 | samba +1 | 3.6.3-84.1 | SUSE-SU-2016:3298-1 |
| SLES 11 SP3 | samba +1 | 3.6.3-84.1 | SUSE-SU-2016:3298-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP2 | samba +1 | 3.6.3-56.1 | SUSE-SU-2016:3300-1 |
| SLES for SAP 12 SP2 | samba | 4.2.4-28.3.1 | SUSE-SU-2016:3272-1, SUSE-SU-2016:3271-1 |
| SLES for SAP 12 SP1 | samba | 4.2.4-28.3.1 | SUSE-SU-2016:3272-1 |
| SLES for SAP 12 | samba | 4.2.4-18.30.1 | SUSE-SU-2016:3299-1 |
| SLES for SAP 11 SP4 | samba +1 | 3.6.3-84.1 | SUSE-SU-2016:3298-1 |
| SUSE OpenStack Cloud 5 | samba +1 | 3.6.3-84.1 | SUSE-SU-2016:3298-1 |
| SUSE Manager Proxy 2.1 | samba +1 | 3.6.3-84.1 | SUSE-SU-2016:3298-1 |
| SUSE Manager 2.1 | samba +1 | 3.6.3-84.1 | SUSE-SU-2016:3298-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | samba +1 | 3.6.3-84.1 | SUSE-SU-2016:3298-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | samba | 4.14.6+git.182.2205d5224e3-1.1 | openSUSE-SU-2024:11365-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.4 | samba | 4.4.5-r2 | — |
| Alpine v3.3 | samba | 4.2.14-r1 | — |
| Alpine v3.2 | samba | 4.2.14-r1 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | samba | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | ctdb +25 | 4.4.4-13.el7_3 | ELSA-2017-1265 |
Advisories 15
- RHSA-2017:1265 Red Hat Security Advisory: samba security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0744 Red Hat Security Advisory: samba4 security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0662 Red Hat Security Advisory: samba security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0495 Red Hat Security Advisory: Red Hat Gluster Storage 3.2.0 samba security, bug fixes and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2017:0494 Red Hat Security Advisory: Red Hat Gluster Storage 3.2.0 samba security, bug fixes and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- USN-3158-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-776-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3740-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:3299-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11365-1 ctdb-4.14.6+git.182.2205d5224e3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3272-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3271-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3298-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3300-1 Security update for samba SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2017-1265 Moderate: samba security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 22, 2017
References
- RHSA-2017:0495 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2125
- RHSA-2017:0494 vendor-advisory
- 1037494 vdb-entry
- RHSA-2017:1265 vendor-advisory
- 94988 vdb-entry
- https://www.samba.org/samba/security/CVE-2016-2125.html
- RHSA-2017:0744 vendor-advisory
- RHSA-2017:0662 vendor-advisory