# CVE-2020-1472: Microsoft Netlogon Privilege Escalation > An unauthenticated attacker can exploit Netlogon to gain domain administrator access on Windows Server domain controllers. - **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C`) - **Exploited in the wild:** Yes, since 3 Nov 2021 (CISA KEV), used in ransomware - **Login needed:** Any signed-in user - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 17 Aug 2020 - **Updated:** 21 Oct 2025 - **Also known as:** ALPINE-CVE-2020-1472, AZL-36991, AZL-7350, CLSA-2025-1766567499, DEBIAN-CVE-2020-1472, ECHO-ef87-c97b-a239, GHSA-gc5h-xf3g-h5x4, MGASA-2020-0380, SUSE-SU-2020:2719-1, SUSE-SU-2020:2720-1, SUSE-SU-2020:2721-1, SUSE-SU-2020:2722-1, SUSE-SU-2020:2724-1, SUSE-SU-2020:2730-1, UBUNTU-CVE-2020-1472, USN-4510-1, USN-4510-2, USN-4559-1, openSUSE-SU-2020:1513-1, openSUSE-SU-2020:1526-1 ## What is CVE-2020-1472? CVE-2020-1472 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 17 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim. ### Official 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. ## Which versions are affected by CVE-2020-1472? It affects 15 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `samba` | SUSE:Enterprise Storage 5 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Enterprise Storage 6 | All versions | 4.9.5+git.373.26895a83dbf-3.44.1 | | `samba` | SUSE:HPE Helion OpenStack 8 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Linux Enterprise High Availability Extension 12 SP2 | All versions | 4.4.2-38.36.1 | | `samba` | SUSE:Linux Enterprise High Availability Extension 12 SP3 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Linux Enterprise High Availability Extension 12 SP4 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Linux Enterprise High Availability Extension 12 SP5 | All versions | 4.10.18+git.208.88201368c52-3.17.1 | | `samba` | SUSE:Linux Enterprise High Availability Extension 15 | All versions | 4.7.11+git.270.63e2076625b-4.48.1 | | `samba` | SUSE:Linux Enterprise High Availability Extension 15 SP1 | All versions | 4.9.5+git.373.26895a83dbf-3.44.1 | | `samba` | SUSE:Linux Enterprise High Availability Extension 15 SP2 | All versions | 4.11.13+git.189.e9bd318cd13-4.11.1 | | `samba` | SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 4.7.11+git.270.63e2076625b-4.48.1 | | `samba` | SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 4.7.11+git.270.63e2076625b-4.48.1 | | `samba` | SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 4.9.5+git.373.26895a83dbf-3.44.1 | | `samba` | SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 4.11.13+git.189.e9bd318cd13-4.11.1 | | `samba` | SUSE:Linux Enterprise Module for Python 2 15 SP1 | All versions | 4.9.5+git.373.26895a83dbf-3.44.1 | | `samba` | SUSE:Linux Enterprise Module for Python 2 15 SP2 | All versions | 4.11.13+git.189.e9bd318cd13-4.11.1 | | `samba` | SUSE:Linux Enterprise Server 12 SP2-BCL | All versions | 4.4.2-38.36.1 | | `samba` | SUSE:Linux Enterprise Server 12 SP2-LTSS | All versions | 4.4.2-38.36.1 | | `samba` | SUSE:Linux Enterprise Server 12 SP3-BCL | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Linux Enterprise Server 12 SP3-LTSS | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Linux Enterprise Server 12 SP4-LTSS | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 4.10.18+git.208.88201368c52-3.17.1 | | `samba` | SUSE:Linux Enterprise Server 15-LTSS | All versions | 4.7.11+git.270.63e2076625b-4.48.1 | | `samba` | SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 4.4.2-38.36.1 | | `samba` | SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Linux Enterprise Server for SAP Applications 12 SP4 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 4.10.18+git.208.88201368c52-3.17.1 | | `samba` | SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 4.7.11+git.270.63e2076625b-4.48.1 | | `samba` | SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 4.10.18+git.208.88201368c52-3.17.1 | | `samba` | SUSE:OpenStack Cloud 7 | All versions | 4.4.2-38.36.1 | | `samba` | SUSE:OpenStack Cloud 8 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:OpenStack Cloud 9 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:OpenStack Cloud Crowbar 8 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | SUSE:OpenStack Cloud Crowbar 9 | All versions | 4.6.16+git.237.40a3f495f75-3.55.1 | | `samba` | openSUSE:Leap 15.1 | All versions | 4.9.5+git.373.26895a83dbf-lp151.2.33.1 | | `samba` | openSUSE:Leap 15.2 | All versions | 4.11.13+git.189.e9bd318cd13-lp152.3.13.1 | Products: Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Microsoft Windows Server 1903, Microsoft Windows Server 1909, Microsoft Windows Server 2004, Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 20h2, Opensuse Leap, Oracle Zfs Storage Appliance Kit, Samba Samba, Synology Directory Server. ## How do I fix CVE-2020-1472? Apply the vendor's patch. US federal agencies must fix it by 3 May 2022. ## Is CVE-2020-1472 being exploited? Yes. Attackers have exploited CVE-2020-1472 in the wild since at least 3 Nov 2021, including in ransomware campaigns. Public exploit code: - Test tool for CVE-2020-1472 (github_poc): https://github.com/bvcyber/CVE-2020-1472 - PoC for Zerologon - all research credits go to Tom Tervoort of Secura (github_poc): https://github.com/dirkjanm/CVE-2020-1472 - Exploit for zerologon cve-2020-1472 (github_poc): https://github.com/risksense/zerologon - Exploit Code for CVE-2020-1472 aka Zerologon (github_poc): https://github.com/VoidSec/CVE-2020-1472 - Abuse CVE-2020-1472 (Zerologon) to take over a domain and then repair the local stored machine account password. (github_poc): https://github.com/bb00/zer0dump - cve-2020-1472 复现利用及其exp (github_poc): https://github.com/mstxq17/cve-2020-1472 ## Other vulnerabilities in Canonical Ubuntu Linux - [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild) - [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild) - [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-1472 and fix it if it is affected. What it is: CVE-2020-1472 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 17 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: Yes. Attackers have exploited CVE-2020-1472 in the wild since at least 3 Nov 2021, including in ransomware campaigns. Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2020-1472/ (Markdown: https://insights.sbomify.com/CVE-2020-1472/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-1472 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-1472 - OSV: https://osv.dev/vulnerability/CVE-2020-1472 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-1472/ Summaries are generated and may contain mistakes; the official description above is the record.