Description
All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where if it is set with "log level = 3" (or above) then the string obtained from the client, after a failed character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange. In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a crash there is harmless).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | samba | All versions 4.11.x before 4.11.5, All versions 4.10.x before 4.10.12, All versions 4.9.x before 4.9.18 | — |
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 | 2:4.11.5+dfsg-1 | — |
| Debian 13 | samba | 2:4.11.5+dfsg-1 | — |
| Debian 12 | samba | 2:4.11.5+dfsg-1 | — |
| Debian 10 | samba | 2:4.9.5+dfsg-5+deb10u4 | DLA-3563-1 |
| Debian 9 | samba | 2:4.5.16+dfsg-1+deb9u4 | DLA-2668-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | samba | 2:4.11.5+dfsg-1ubuntu1 | — |
| Ubuntu 18.04 LTS | samba | 2:4.7.6+dfsg~ubuntu-0ubuntu2.15 | USN-4244-1 |
| Ubuntu 16.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.16.04.25 | USN-4244-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | samba | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | ctdb +22 | 4.11.2-13.el8 | RHSA-2020:1878 |
| RHEL 8 | openchange | 2.3-24.el8 | RHSA-2020:1878 |
| RHEL 7 | ctdb +26 | 4.10.16-5.el7 | RHSA-2020:3981 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Gluster Storage 3 | ctdb +20 | 4.11.6-104.el7rhgs | RHSA-2020:0943 |
| Red Hat Gluster Storage 3 | libtalloc +3 | 2.2.0-9.el7rhgs | RHSA-2020:0943 |
| Red Hat Gluster Storage 3 | libtdb +3 | 1.4.2-4.el7rhgs | RHSA-2020:0943 |
| Red Hat Gluster Storage 3 | libtevent +2 | 0.10.0-4.el7rhgs | RHSA-2020:0943 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | samba | 4.9.5+git.243.e76c5cb3d97-3.21.1 | SUSE-SU-2020:0223-1 |
| SLES 15 | samba | 4.7.11+git.218.58b95cbfc0f-4.37.1 | SUSE-SU-2020:0224-1 |
| SLES 12 SP5 | ldb | 1.5.8-3.5.1 | SUSE-SU-2020:2673-1 |
| SLES 12 SP5 | samba | 4.10.5+git.134.674d33703a6-3.3.1 | SUSE-SU-2020:2673-1, SUSE-SU-2020:0152-1 |
| SLES 12 SP4 | samba | 4.6.16+git.174.c2fd2e28c84-3.49.1 | SUSE-SU-2020:0233-1 |
| SLES 12 SP3 | samba | 4.6.16+git.174.c2fd2e28c84-3.49.1 | SUSE-SU-2020:0233-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 2 | samba | 4.9.5+git.243.e76c5cb3d97-3.21.1 | SUSE-SU-2020:0223-1 |
| SLES for SAP 15 | samba | 4.7.11+git.218.58b95cbfc0f-4.37.1 | SUSE-SU-2020:0224-1 |
| SLES for SAP 12 SP5 | ldb | 1.5.8-3.5.1 | SUSE-SU-2020:2673-1 |
| SLES for SAP 12 SP5 | samba | 4.10.5+git.134.674d33703a6-3.3.1 | SUSE-SU-2020:2673-1, SUSE-SU-2020:0152-1 |
| SLES for SAP 12 SP4 | samba | 4.6.16+git.174.c2fd2e28c84-3.49.1 | SUSE-SU-2020:0233-1 |
| SLES for SAP 12 SP3 | samba | 4.6.16+git.174.c2fd2e28c84-3.49.1 | SUSE-SU-2020:0233-1 |
| SLE HPC 15 | samba | 4.7.11+git.218.58b95cbfc0f-4.37.1 | SUSE-SU-2020:0224-1 |
| SUSE OpenStack Cloud Crowbar 8 | samba | 4.6.16+git.174.c2fd2e28c84-3.49.1 | SUSE-SU-2020:0233-1 |
| SUSE OpenStack Cloud 8 | samba | 4.6.16+git.174.c2fd2e28c84-3.49.1 | SUSE-SU-2020:0233-1 |
| SUSE HPE Helion OpenStack 8 | samba | 4.6.16+git.174.c2fd2e28c84-3.49.1 | SUSE-SU-2020:0233-1 |
| SUSE Enterprise Storage 6 | samba | 4.9.5+git.243.e76c5cb3d97-3.21.1 | SUSE-SU-2020:0223-1 |
| SUSE Enterprise Storage 5 | samba | 4.6.16+git.174.c2fd2e28c84-3.49.1 | SUSE-SU-2020:0233-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | samba | 4.14.6+git.182.2205d5224e3-1.1 | openSUSE-SU-2024:11365-1 |
| openSUSE Leap 15.1 | samba | 4.9.5+git.243.e76c5cb3d97-lp151.2.15.1 | openSUSE-SU-2020:0122-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | samba | 4.11.5-r0 | — |
| Alpine v3.23 | samba | 4.11.5-r0 | — |
| Alpine v3.22 | samba | 4.11.5-r0 | — |
| Alpine v3.21 | samba | 4.11.5-r0 | — |
| Alpine v3.20 | samba | 4.11.5-r0 | — |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | samba | 4.11.5-r0 | — |
| Alpine v3.18 | samba | 4.11.5-r0 | — |
| Alpine v3.17 | samba | 4.11.5-r0 | — |
| Alpine v3.16 | samba | 4.11.5-r0 | — |
| Alpine v3.15 | samba | 4.11.5-r0 | — |
| Alpine v3.14 | samba | 4.11.5-r0 | — |
| Alpine v3.13 | samba | 4.11.5-r0 | — |
| Alpine v3.12 | samba | 4.11.5-r0 | — |
| Alpine v3.11 | samba | 4.11.5-r0 | — |
| Alpine v3.10 | samba | 4.10.12-r0 | — |
| Alpine v3.9 | samba | 4.8.12-r2 | — |
| Alpine v3.8 | samba | 4.8.12-r2 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | ctdb +26 | 4.10.16-7.amzn2.0.1 | ALAS2-2020-1544 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | ctdb +22 | 4.11.2-13.el8 | ELSA-2020-1878 |
| Oracle Linux 8 | openchange | 2.3-24.0.1.el8 | ELSA-2020-1878 |
| Oracle Linux 7 | ctdb +26 | 4.10.16-5.el7 | ELSA-2020-3981 |
Advisories 17
- RHSA-2020:3981 Red Hat Security Advisory: samba security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:1878 Red Hat Security Advisory: samba security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4244-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3563-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2668-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2020:0943 Red Hat Security Advisory: samba security and bug fix update Red Hat Security Advisories (RHSA) · Feb 21, 2026
- SUSE-SU-2020:2673-1 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-2020:0223-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0233-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0122-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0224-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0152-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-2365 Samba: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 14, 2023
- ALAS2-2020-1544 Moderate: samba security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 22, 2020
- ELSA-2020-3981 Moderate: samba security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
- ELSA-2020-1878 Moderate: samba security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 5, 2020
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14907
- https://www.samba.org/samba/security/CVE-2019-14907.html
- https://security.netapp.com/advisory/ntap-20200122-0001/
- https://www.synology.com/security/advisory/Synology_SA_20_01
- USN-4244-1 vendor-advisory
- openSUSE-SU-2020:0122 vendor-advisory
- FEDORA-2020-6bd386c7eb vendor-advisory
- FEDORA-2020-f92cd0e72b vendor-advisory
- GLSA-202003-52 vendor-advisory
- [debian-lts-announce] 20210529 [SECURITY] [DLA 2668-1] samba security update mailing-list
- [debian-lts-announce] 20230914 [SECURITY] [DLA 3563-1] samba security update mailing-list