Description
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network.
To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access.
Microsoft is addressing the vulnerability in a phased two-part rollout. These updates address the vulnerability by modifying how Netlogon handles the usage of Netlogon secure channels.
For guidelines on how to manage the changes required for this vulnerability and more information on the phased rollout, see How to manage the changes in Netlogon secure channel connections associated with CVE-2020-1472 (updated September 28, 2020).
When the second phase of Windows updates become available in Q1 2021, customers will be notified via a revision to this security vulnerability. If you wish to be notified when these updates are released, we recommend that you register for the security notifications mailer to be alerted of content changes to this advisory. See Microsoft Technical Security Notifications.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows Server version 2004 | 10.0.0 – < publication | publication |
| Microsoft | Windows Server 2019 | 10.0.0 – < publication | publication |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 – < publication | publication |
| Microsoft | Windows Server, version 1909 (Server Core installation) | 10.0.0 – < publication | publication |
| Microsoft | Windows Server, version 1903 (Server Core installation) | 10.0.0 – < publication | publication |
| Microsoft | Windows Server 2016 | 10.0.0 – < publication | publication |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.0 – < publication | publication |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.0 – < publication | publication |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.0.0 – < publication | publication |
| Microsoft | Windows Server 2012 | 6.2.0 – < publication | publication |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.0 – < publication | publication |
| Microsoft | Windows Server 2012 R2 | 6.3.0 – < publication | publication |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.0 – < publication | publication |
| Microsoft | Windows Server version 20H2 | 10.0.0 – < publication | publication |
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 | 2:4.13.2+dfsg-2 | — |
| Debian 13 | samba | 2:4.13.2+dfsg-2 | — |
| Debian 12 | samba | 2:4.13.2+dfsg-2 | — |
| Debian 9 | samba | 2:4.5.16+dfsg-1+deb9u3 | DLA-2463-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | samba | 2:4.11.6+dfsg-0ubuntu1.5 | USN-4559-1 |
| Ubuntu 18.04 LTS | samba | 2:4.7.6+dfsg~ubuntu-0ubuntu2.20 | USN-4559-1, USN-4510-1 |
| Ubuntu 16.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.16.04.31 | USN-4559-1, USN-4510-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm9 | USN-4510-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | ctdb +24 | 4.13.3-3.el8 | RHSA-2021:1647 |
| RHEL 8 | openchange | 2.3-27.el8 | RHSA-2021:1647 |
| RHEL 7 | ctdb +26 | 4.10.16-9.el7_9 | RHSA-2020:5439 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Gluster Storage 3 | ctdb +20 | 4.11.6-112.el7rhgs | RHSA-2021:3723, RHBA-2021:1503 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | openchange | 2.3-27.el8 | ALSA-2021:1647 |
| AlmaLinux 8 | samba-devel +2 | 4.13.3-3.el8 | ALSA-2021:1647 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | openchange | 2.3-27.el8 | RLSA-2021:1647 |
| Rocky Linux 8 | samba | 4.13.3-3.el8 | RLSA-2021:1647 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | sca-patterns-base | 1.5.0-150300.10.3.1 | SUSE-FU-2022:4496-1 |
| SLES 15 SP3 | sca-patterns-hae | 1.5.1-150300.10.3.1 | SUSE-FU-2022:4496-1 |
| SLES 15 SP3 | sca-patterns-sle11 | 1.5.1-150300.18.3.1 | SUSE-FU-2022:4496-1 |
| SLES 15 SP3 | sca-patterns-sle12 | 1.5.1-150300.3.3.1 | SUSE-FU-2022:4496-1 |
| SLES 15 SP3 | sca-patterns-sle15 | 1.5.1-150300.14.3.1 | SUSE-FU-2022:4496-1 |
| SLES 15 SP3 | sca-patterns-suma | 1.5.0-150300.9.3.1 | SUSE-FU-2022:4496-1 |
| SLES 15 SP3 | sca-server-report | 1.5.1-150300.11.3.1 | SUSE-FU-2022:4496-1 |
| SLES 15 SP2 | samba | 4.11.13+git.189.e9bd318cd13-4.11.1 | SUSE-SU-2020:2730-1 |
| SLES 15 SP1 | samba | 4.9.5+git.373.26895a83dbf-3.44.1 | SUSE-SU-2020:2722-1 |
| SLES 15 | samba | 4.7.11+git.270.63e2076625b-4.48.1 | SUSE-SU-2020:2719-1 |
| SLES 12 SP5 | samba | 4.10.18+git.208.88201368c52-3.17.1 | SUSE-SU-2020:2720-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SLES 12 SP3 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SLES 12 SP2 | samba | 4.4.2-38.36.1 | SUSE-SU-2020:2724-1 |
| SLES 2 | samba | 4.9.5+git.373.26895a83dbf-3.44.1 | SUSE-SU-2020:2730-1, SUSE-SU-2020:2722-1 |
| SLES for SAP 15 | samba | 4.7.11+git.270.63e2076625b-4.48.1 | SUSE-SU-2020:2719-1 |
| SLES for SAP 12 SP5 | samba | 4.10.18+git.208.88201368c52-3.17.1 | SUSE-SU-2020:2720-1 |
| SLES for SAP 12 SP4 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SLES for SAP 12 SP3 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SLES for SAP 12 SP2 | samba | 4.4.2-38.36.1 | SUSE-SU-2020:2724-1 |
| SLE HPC 15 | samba | 4.7.11+git.270.63e2076625b-4.48.1 | SUSE-SU-2020:2719-1 |
| SUSE OpenStack Cloud Crowbar 9 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SUSE OpenStack Cloud Crowbar 8 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SUSE OpenStack Cloud 9 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SUSE OpenStack Cloud 8 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SUSE OpenStack Cloud 7 | samba | 4.4.2-38.36.1 | SUSE-SU-2020:2724-1 |
| SUSE HPE Helion OpenStack 8 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
| SUSE Enterprise Storage 6 | samba | 4.9.5+git.373.26895a83dbf-3.44.1 | SUSE-SU-2020:2722-1 |
| SUSE Enterprise Storage 5 | samba | 4.6.16+git.237.40a3f495f75-3.55.1 | SUSE-SU-2020:2721-1 |
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 Tumbleweed | sca-patterns-sle12 +1 | 1.0.8-2.2 | openSUSE-SU-2024:11371-1, openSUSE-SU-2024:11370-1 |
| openSUSE Leap 15.3 | sca-patterns-base | 1.5.0-150300.10.3.1 | SUSE-FU-2022:4496-1 |
| openSUSE Leap 15.3 | sca-patterns-hae | 1.5.1-150300.10.3.1 | SUSE-FU-2022:4496-1 |
| openSUSE Leap 15.3 | sca-patterns-sle11 | 1.5.1-150300.18.3.1 | SUSE-FU-2022:4496-1 |
| openSUSE Leap 15.3 | sca-patterns-sle12 | 1.5.1-150300.3.3.1 | SUSE-FU-2022:4496-1 |
| openSUSE Leap 15.3 | sca-patterns-sle15 | 1.5.1-150300.14.3.1 | SUSE-FU-2022:4496-1 |
| openSUSE Leap 15.3 | sca-patterns-suma | 1.5.0-150300.9.3.1 | SUSE-FU-2022:4496-1 |
| openSUSE Leap 15.3 | sca-server-report | 1.5.1-150300.11.3.1 | SUSE-FU-2022:4496-1 |
| openSUSE Leap 15.2 | samba | 4.11.13+git.189.e9bd318cd13-lp152.3.13.1 | openSUSE-SU-2020:1526-1 |
| openSUSE Leap 15.1 | samba | 4.9.5+git.373.26895a83dbf-lp151.2.33.1 | openSUSE-SU-2020:1513-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | samba | 4.12.7-r0 | — |
| Alpine v3.23 | samba | 4.12.7-r0 | — |
| Alpine v3.22 | samba | 4.12.7-r0 | — |
| Alpine v3.21 | samba | 4.12.7-r0 | — |
| Alpine v3.20 | samba | 4.12.7-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | samba | 4.12.7-r0 | — |
| Alpine v3.18 | samba | 4.12.7-r0 | — |
| Alpine v3.17 | samba | 4.12.7-r0 | — |
| Alpine v3.16 | samba | 4.12.7-r0 | — |
| Alpine v3.15 | samba | 4.12.7-r0 | — |
| Alpine v3.14 | samba | 4.12.7-r0 | — |
| Alpine v3.13 | samba | 4.12.7-r0 | — |
| Alpine v3.12 | samba | 4.12.7-r0 | — |
| Alpine v3.11 | samba | 4.11.14-r0 | — |
| Alpine v3.10 | samba | 4.10.18-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | ctdb +26 | 4.10.16-9.amzn2.0.1 | ALAS2-2021-1585 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | samba | 4.18.3-1 | — |
| Azure Linux 2 (CBL-Mariner) | samba | 4.12.5-4 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | ctdb +24 | 4.13.3-3.el8 | ELSA-2021-1647 |
| Oracle Linux 8 | openchange | 2.3-27.0.1.el8 | ELSA-2021-1647 |
| Oracle Linux 7 | ctdb +26 | 4.10.16-9.el7_9 | ELSA-2020-5439 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
Netlogon Weak Cryptographic Authentication
auxiliary/admin/dcerpc/cve_2020_1472_zerologon
Exploit-DB 1
- ZeroLogon - Netlogon Elevation of Privilege EDB-49071 · remote · Nov 18, 2020
GitHub 73 repositories · most starred shown
-
bvcyber/CVE-2020-1472 ★ 1,840 · Sep 8, 2020
Test tool for CVE-2020-1472
-
dirkjanm/CVE-2020-1472 ★ 1,334 · Sep 14, 2020
PoC for Zerologon - all research credits go to Tom Tervoort of Secura
-
risksense/zerologon ★ 709 · Sep 14, 2020
Exploit for zerologon cve-2020-1472
-
VoidSec/CVE-2020-1472 ★ 399 · Sep 14, 2020
Exploit Code for CVE-2020-1472 aka Zerologon
-
bb00/zer0dump ★ 179 · Sep 14, 2020
Abuse CVE-2020-1472 (Zerologon) to take over a domain and then repair the local stored machine account password.
-
mstxq17/cve-2020-1472 ★ 113 · Sep 16, 2020
cve-2020-1472 复现利用及其exp
-
Rvn0xsy/ZeroLogon ★ 83 · Aug 31, 2022
CVE-2020-1472 C++
-
zeronetworks/zerologon ★ 61 · Sep 17, 2020
Test script for CVE-2020-1472 for both RPC/TCP and RPC/SMB
-
k8gege/CVE-2020-1472-EXP ★ 58 · Sep 15, 2020
Ladon Moudle CVE-2020-1472 Exploit 域控提权神器
-
cube0x0/CVE-2020-1472 ★ 38 · Sep 14, 2020
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 26
- ALSA-2021:1647 Moderate: samba security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:1647 Red Hat Security Advisory: samba security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2020:5439 Red Hat Security Advisory: samba security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-4559-1 samba update Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4510-1 samba vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-4510-2 samba vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-2463-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2021:3723 Red Hat Security Advisory: samba security, bug fix and enhancement update Red Hat Security Advisories (RHSA) · Feb 24, 2026
- RHBA-2021:1503 Red Hat Bug Fix Advisory: samba bug fix update Red Hat Security Advisories (RHSA) · Feb 24, 2026
- RLSA-2021:1647 Moderate: samba security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2020:2720-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2722-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2719-1 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-FU-2022:4496-1 Feature update for SCA patterns SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2724-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2730-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1513-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:2721-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11370-1 sca-patterns-sle12-1.0.8-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1526-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11371-1 sca-patterns-sle15-1.0.8-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SEVD-2021-285-05 Conext™ Advisor & Conext™ Control V2 Schneider Electric CPCERT · Oct 12, 2021
- ELSA-2021-1647 Moderate: samba security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
- ALAS2-2021-1585 Critical: samba security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 6, 2021
- ELSA-2020-5439 Moderate: samba security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 16, 2020
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1472
- VU#490028 third-party-advisory
- [oss-security] 20200917 Samba and CVE-2020-1472 ("Zerologon") mailing-list
- USN-4510-1 vendor-advisory
- USN-4510-2 vendor-advisory
- FEDORA-2020-0be2776ed3 vendor-advisory
- openSUSE-SU-2020:1513 vendor-advisory
- openSUSE-SU-2020:1526 vendor-advisory
- FEDORA-2020-77c15664b0 vendor-advisory
- FEDORA-2020-a1d139381a vendor-advisory
- USN-4559-1 vendor-advisory
- [debian-lts-announce] 20201123 [SECURITY] [DLA 2463-1] samba security update mailing-list
- GLSA-202012-24 vendor-advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html
- http://packetstormsecurity.com/files/159190/Zerologon-Proof-Of-Concept.html
- https://www.synology.com/security/advisory/Synology_SA_20_21
- http://packetstormsecurity.com/files/160127/Zerologon-Netlogon-Privilege-Escalation.html