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ExploitedIn CISA KEVFix available

CVE-2020-1472

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · enisa-cnw-kev, GCVE · kevintel.

  • Published2020-08-17
  • Fixed in4.12.7 · 4.11.13 · 4.10.18

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2020-08-1719:15CVE publishedNVD
  2. 2020-11-18Exploit-DB entryExploit-DB
  3. 2021-11-03Added to the CISA KEV catalogCISA KEV
  4. 2021-11-03Listed as exploited by GCVEGCVE
  5. 2021-11-03Exploitation first reportedCISA KEV
  6. 2024-01-3018:45SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-1472?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-1472?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Samba
BranchAffectedFixed in
4.12≥ 4.12.0, < 4.12.74.12.7
4.11≥ 4.11.0, < 4.11.134.11.13
4.10< 4.10.184.10.18
Canonical ubuntu linux
BranchAffectedFixed in
14.4= 14.04no fix published
16.4= 16.04no fix published
18.4= 18.04no fix published
20.4= 20.04no fix published
Fedoraproject fedora
BranchAffectedFixed in
31.x= 31no fix published
32.x= 32no fix published
33.x= 33no fix published

12 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA14 products

As microsoft, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Microsoft Windows Server version 2004

    platforms: x64-based Systems

    Affected
    • ≥ 10.0.0, < publicationfixed in publicationcustom
  • Microsoft Windows Server 2019

    platforms: x64-based Systems

    Affected
    • ≥ 10.0.0, < publicationfixed in publicationcustom
  • Microsoft Windows Server 2019 (Server Core installation)

    platforms: x64-based Systems

    Affected
    • ≥ 10.0.0, < publicationfixed in publicationcustom
  • Microsoft Windows Server, version 1909 (Server Core installation)

    platforms: x64-based Systems

    Affected
    • ≥ 10.0.0, < publicationfixed in publicationcustom
  • Microsoft Windows Server, version 1903 (Server Core installation)

    platforms: x64-based Systems

    Affected
    • ≥ 10.0.0, < publicationfixed in publicationcustom
  • Microsoft Windows Server 2016

    platforms: x64-based Systems

    Affected
    • ≥ 10.0.0, < publicationfixed in publicationcustom

8 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2024-05-29

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • openchangeRocky Linux:8all versions · fixed in 0:2.3-27.el8
  • openchangeRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:2.3-27.el8and 3 other packages
  • openchangeAlmaLinux:8all versions · fixed in 2.3-27.el8
  • sambaUbuntu:Pro:14.04:LTSall versions · fixed in 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm9
  • sambaUbuntu:20.04:LTSall versions · fixed in 2:4.11.6+dfsg-0ubuntu1.5
  • sambaUbuntu:18.04:LTSall versions · fixed in 2:4.7.6+dfsg~ubuntu-0ubuntu2.20
  • sambaUbuntu:18.04:LTSall versions · fixed in 2:4.7.6+dfsg~ubuntu-0ubuntu2.19
  • sambaUbuntu:16.04:LTSall versions · fixed in 2:4.3.11+dfsg-0ubuntu0.16.04.31

88 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-1472 Red Hat Product Security1,587 products fixed · 30 known affected

    samba: Netlogon elevation of privilege vulnerability (Zerologon)

    samba.src as a component of Red Hat Enterprise Linux 5 · libsmbclient as a component of Red Hat Enterprise Linux 6 · libsmbclient-devel as a component of Red Hat Enterprise Linux 6 · +27 more

  • RHSA-2021:3723 Red Hat Product Security23 products fixed

    Red Hat Security Advisory: samba security, bug fix and enhancement update

  • RHSA-2021:1647 Red Hat Product Security316 products fixed

    Red Hat Security Advisory: samba security, bug fix, and enhancement update

  • RHBA-2021:1503 Red Hat Product Security43 products fixed

    Red Hat Bug Fix Advisory: samba bug fix update

  • RHSA-2020:5439 Red Hat Product Security251 products fixed

    Red Hat Security Advisory: samba security and bug fix update

Full record on NVD

Fix

  1. Update Samba to 4.12.7 · 4.11.13 · 4.10.18
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-05-03
  3. Vendor fix Red Hat Product Security RHSA-2021:3723 · 23 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  4. Vendor fix Red Hat Product Security RHSA-2021:1647 · 316 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, the smb service will be restarted automatically.
  5. Workaround from the vendor Red Hat Product Security RHSA-2021:3723 · 23 productsThis flaw can be mitigated by using "server schannel = yes" in the smb.conf configuration file.
  6. No fix available, says the vendor Red Hat Product Security CVE-2020-1472 · 29 productsAffected
  7. No fix planned, says the vendor Red Hat Product Security CVE-2020-1472 · 1 productWill not fix

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-49071
Exploit-DB
Proof-of-concept repositories
20 repositories, unverifiedTobey123/CVE-2020-1472-visualizerbvcyber/CVE-2020-1472cube0x0/CVE-2020-1472dirkjanm/CVE-2020-1472VoidSec/CVE-2020-1472
PoC-in-GitHub
Metasploit modules
1 moduleauxiliary/admin/dcerpc/cve_2020_1472_zerologonrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2021-11-03
Patch Due Date
2022-05-03
Ransomware Use
Known
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
2020-08-17
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-gc5h-xf3g-h5x4

Frequently asked questions

What is CVE-2020-1472?

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.

Is CVE-2020-1472 actively exploited?

Yes. CVE-2020-1472 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

What is the CVSS score for CVE-2020-1472?

CVE-2020-1472 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

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