Privilege escalation in Windows AppX Deployment Service
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-0841 |
| CWE-ID | CWE-20 |
| Exploitation vector | Local |
| Public exploit | Vulnerability #1 is being exploited in the wild. |
| Vulnerable software Subscribe |
Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Input validation error
EUVDB-ID: #VU18167
Risk: Low
CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID: CVE-2019-0841
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: Yes
DescriptionThe 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.
Install update from vendor's website.
Vulnerable software versionsWindows: 10 1703 - 10 1809
Windows Server: 2019 - 2019 1803
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
