Description
An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context.
To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system.
The security update addresses the vulnerability by correcting how CLFS handles objects in memory.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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 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 |
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.
Exploit-DB 1
- Microsoft Windows - 'CmpAddRemoveContainerToCLFSLog' Arbitrary File/Directory Creation EDB-47028 · dos · Jun 24, 2019 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.