CVE-2020-1472
Microsoft Netlogon Privilege Escalation Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 99.39% probability · 100th percentile
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022 · used in ransomware campaigns
- Affected
- 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 · fedoraproject/fedora · opensuse/leap · canonical/ubuntu linux · synology/directory server · samba/samba · debian/debian linux · oracle/zfs storage appliance kit
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions. Reference CISA's ED 20-04 (https://www.cisa.gov/news-events/directives/ed-20-04-mitigate-netlogon-elevation-privilege-vulnerability-august-2020-patch-tuesday) for further guidance and requirements. Note: The due date for addressing this vulnerability aligns with the requirements outlined in ED 20-04. https://nvd.nist.gov/vuln/detail/CVE-2020-1472
References
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00080.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00086.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/159190/Zerologon-Proof-Of-Concept.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/160127/Zerologon-Netlogon-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2020/09/17/2Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H4OTFBL6YDVFH2TBJFJIE4FMHPJEEJK3/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ST6X3A2XXYMGD4INR26DQ4FP4QSM753B/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TAPQQZZAT4TG3XVRTAFV2Y3S7OAHFBUP/Mailing List, Third Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1472Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202012-24Third Party Advisory
- https://usn.ubuntu.com/4510-1/Third Party Advisory
- https://usn.ubuntu.com/4510-2/Third Party Advisory
- https://usn.ubuntu.com/4559-1/Third Party Advisory
- https://www.kb.cert.org/vuls/id/490028Third Party Advisory, US Government Resource
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://www.synology.com/security/advisory/Synology_SA_20_21Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00080.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00086.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/159190/Zerologon-Proof-Of-Concept.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/160127/Zerologon-Netlogon-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2020/09/17/2Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H4OTFBL6YDVFH2TBJFJIE4FMHPJEEJK3/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ST6X3A2XXYMGD4INR26DQ4FP4QSM753B/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TAPQQZZAT4TG3XVRTAFV2Y3S7OAHFBUP/Mailing List, Third Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1472Patch, Vendor Advisory
- https://security.gentoo.org/glsa/202012-24Third Party Advisory
- https://usn.ubuntu.com/4510-1/Third Party Advisory
- https://usn.ubuntu.com/4510-2/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.