May 2020:
CVE-2020-1054 Published on May 21, 2020
An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1143.
Known Exploited Vulnerability
This Microsoft Win32k Privilege Escalation Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. A privilege escalation vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory.
The following remediation steps are recommended / required by May 3, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2020-1054 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2020-1054 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2020-1054
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Affected Versions
Microsoft Windows:- Version 10 Version 1803 for 32-bit Systems is affected.
- Version 10 Version 1803 for x64-based Systems is affected.
- Version 10 Version 1803 for ARM64-based Systems is affected.
- Version 10 Version 1809 for 32-bit Systems is affected.
- Version 10 Version 1809 for x64-based Systems is affected.
- Version 10 Version 1809 for ARM64-based Systems is affected.
- Version 10 Version 1709 for 32-bit Systems is affected.
- Version 10 Version 1709 for x64-based Systems is affected.
- Version 10 Version 1709 for ARM64-based Systems is affected.
- Version 10 for 32-bit Systems is affected.
- Version 10 for x64-based Systems is affected.
- Version 10 Version 1607 for 32-bit Systems is affected.
- Version 10 Version 1607 for x64-based Systems is affected.
- Version 7 for 32-bit Systems Service Pack 1 is affected.
- Version 7 for x64-based Systems Service Pack 1 is affected.
- Version 8.1 for 32-bit systems is affected.
- Version 8.1 for x64-based systems is affected.
- Version RT 8.1 is affected.
- Version version 1803 (Core Installation) is affected.
- Version 2019 is affected.
- Version 2019 (Core installation) is affected.
- Version 2016 is affected.
- Version 2016 (Core installation) is affected.
- Version 2008 for 32-bit Systems Service Pack 2 is affected.
- Version 2008 for 32-bit Systems Service Pack 2 (Core installation) is affected.
- Version 2008 for Itanium-Based Systems Service Pack 2 is affected.
- Version 2008 for x64-based Systems Service Pack 2 is affected.
- Version 2008 for x64-based Systems Service Pack 2 (Core installation) is affected.
- Version 2008 R2 for Itanium-Based Systems Service Pack 1 is affected.
- Version 2008 R2 for x64-based Systems Service Pack 1 is affected.
- Version 2008 R2 for x64-based Systems Service Pack 1 (Core installation) is affected.
- Version 2012 is affected.
- Version 2012 (Core installation) is affected.
- Version 2012 R2 is affected.
- Version 2012 R2 (Core installation) is affected.
- Version unspecified is affected.
- Version unspecified is affected.
- Version unspecified is affected.
- Version unspecified is affected.
- Version unspecified is affected.
- Version unspecified is affected.
- Version unspecified is affected.
- Version unspecified is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.