Description
A security feature bypass vulnerability exists where a NETLOGON message is able to obtain the session key and sign messages.
To exploit this vulnerability, an attacker could send a specially crafted authentication request. An attacker who successfully exploited this vulnerability could access another machine using the original user privileges.
The issue has been addressed by changing how NTLM validates network authentication messages.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 10 Version 1703 | 10.0.0 – < publication | publication |
| Microsoft | Windows 10 Version 1803 | 10.0.0 – < publication | publication |
| Microsoft | Windows Server, version 1803 (Server Core Installation) | 10.0.0 – < publication | publication |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – < publication, 10.0.0 – < publication | publication |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < publication | publication |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < publication | publication |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems | 10.0.0 – < publication | publication |
| Microsoft | Windows 10 Version 1709 | 10.0.0 – < publication | publication |
| Microsoft | Windows 10 Version 1903 for 32-bit Systems | 10.0.0 – < publication | publication |
| Microsoft | Windows 10 Version 1903 for x64-based Systems | 10.0.0 – < publication | publication |
| Microsoft | Windows 10 Version 1903 for ARM64-based Systems | 10.0.0 – < publication | publication |
| Microsoft | Windows Server, version 1903 (Server Core installation) | 10.0.0 – < publication | publication |
| Microsoft | Windows 10 Version 1507 | 10.0.10240.0 – < publication | publication |
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – < publication | publication |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – < publication | publication |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – < publication | publication |
| Microsoft | Windows 7 | 6.1.0 – < publication | publication |
| Microsoft | Windows 7 Service Pack 1 | 6.1.0 – < publication | publication |
| Microsoft | Windows 8.1 | 6.3.0 – < publication | publication |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 – < publication, 6.0.0 – < publication | publication |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0 – < publication | publication |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 – < publication | publication |
| Microsoft | Windows Server 2008 R2 Systems Service Pack 1 | 6.1.0 – < publication | publication |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0 – < publication | publication |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0 – < publication | publication |
| Microsoft | Windows Server 2012 | 6.2.9200.0 – < publication | publication |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 – < publication | publication |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – < publication | publication |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – < publication | publication |
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.
Exploit-DB 1
- Microsoft Windows 10.0.17134.648 - HTTP -> SMB NTLM Reflection Leads to Privilege Elevation EDB-47115 · local · Jul 12, 2019 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- Microsoft Windows Security Feature Bypass Vulnerability vendor-advisory