Seccurity restrictions bypass in System Management Automation for PowerShell
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-1167 |
| CWE-ID | CWE-284 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
System.Management.Automation Server applications / Remote management servers, RDP, SSH |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Improper access control
EUVDB-ID: #VU19320
Risk: Low
CVSSv3.1: 5.6 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-1167
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to gain unauthorized access to sensitive information.
The vulnerability exists due to improper access restrictions in Windows Defender Application Control (WDAC). A local administrator can bypass WDAC enforcement, circumvent PowerShell Core Constrained Language Mode on the machine and access resources in an unintended way.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSystem.Management.Automation: 6.1.0 - 6.2.0
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1167
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.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
