SB2020090821 - Multiple vulnerabilities in Microsoft Win32k
Published: September 8, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2020-1152)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error when Windows improperly handles calls to Win32k. A local user can use a specially crafted application to trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Out-of-bounds read (CVE-ID: CVE-2020-1250)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the win32k component. A local user can use a specially crafted application to trigger out-of-bounds read error and read contents of memory on the system.
3) Buffer overflow (CVE-ID: CVE-2020-1245)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error when processing objects in memory within the Win32k component. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.
4) Out-of-bounds read (CVE-ID: CVE-2020-0941)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the win32k component. A local user can use a specially crafted application to trigger out-of-bounds read error and read contents of memory on the system.
Remediation
Install update from vendor's website.
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1152
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1250
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1245
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0941