Privilege escalation in Microsoft Netlogon

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU45628

Risk: High

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-1472

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in Netlogon. A remote non-authenticated attacker can use MS-NRPC to connect to a domain controller to obtain domain administrator access. This vulnerability was dubbed ZeroLogon.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2008 R2 - 2019 2004

CPE2.3

• cpe:2.3:o:microsoft:windows_server:2008 R2:*:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.10:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows_server:2019 2004:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1472
http://www.secura.com/blog/zero-logon

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.