Input validation error in Microsoft Windows and Windows Server - CVE-2019-0841
Published: April 10, 2019 / Updated: March 16, 2022
Vulnerability identifier: #VU18167
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-0841
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the way Windows AppX Deployment Service (AppXSVC) handles hard links. A local user can create a malicious application, launch it on the system and run processes in an elevated context.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2019-0841
Install update from vendor's website.
Links to Public Exploits and PoC-codes
- Exploit #6068 - Microsoft Windows 10 < build 17763 - AppXSvc Hard Link Privilege Escalation (Metasploit) (June 17, 2021)
- Exploit #6072 - Microsoft Windows - AppX Deployment Service Local Privilege Escalation (3) (June 17, 2021)
- Exploit #6076 - Microsoft Windows - AppX Deployment Service Local Privilege Escalation (2) (June 17, 2021)
- Exploit #6054 - AppXSvc - Privilege Escalation (June 17, 2021)
- Exploit #5827 - AppXSvc 17763 - Arbitrary File Overwrite (DoS) (June 17, 2021)
- Exploit #237 - CVE-EXPLOIT-DB () (March 18, 2020)
- Exploit #1523 - AppXSvc Hard Link Privilege Escalation (March 18, 2020)