Vulnerability in Microsoft Powershell
CVE-2020-0951
<p>A security feature bypass vulnerability exists in Windows Defender Application Control (WDAC) which could allow an attacker to bypass WDAC enforcement. An attacker who successfully exploited this vulnerability could execute PowerShell commands that would be blocked by WDAC.</p> <p>To exploit the vulnerability, an attacker need administrator access on a local machine where PowerShell is running. The attacker could then connect to a PowerShell session and send commands to execute arbitrary code.</p> <p>The update addresses the vulnerability by correcting how PowerShell commands are validated when WDAC protection is enabled.</p>
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.066 (93.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.070 · newest: 0.066 · change: -0.005
Affected products
- Microsoft Powershell — versions 7.0.8
- Microsoft Powershell 7.0 — versions 7.0.0
- Microsoft Powershell 7.1 — versions 7.1.0
- Microsoft Windows 10 — versions 1607, 1709, 1803
- Microsoft Windows 10 Version 1607 — versions 10.0.0
- Microsoft Windows 10 Version 1709 — versions 10.0.0
- Microsoft Windows 10 Version 1709 For 32-Bit Systems — versions 10.0.0
- Microsoft Windows 10 Version 1803 — versions 10.0.0
- Microsoft Windows 10 Version 1809 — versions 10.0.0
- Microsoft Windows 10 Version 1903 For 32-Bit Systems — versions 10.0.0
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0951 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-0951?
- CVE-2020-0951 is a medium-severity vulnerability in Microsoft Powershell. CVSS score: 6.7/10. Published 2020-09-11.
- How severe is CVE-2020-0951?
- Medium severity. CVSS v3 base score is 6.7 out of 10.
- Is CVE-2020-0951 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.