SB2020060916 - Multiple vulnerabilities in Microsoft Win32k
Published: June 9, 2020 Updated: June 10, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2020-1207)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in Microsoft Windows win32kfull PDEVOBJ when processing palette objects. A local user can run a specially crafted application and execute arbitrary code with SYSTEM privileges.
2) Buffer overflow (CVE-ID: CVE-2020-1247)
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 Windows kernel-mode driver. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.
3) Buffer overflow (CVE-ID: CVE-2020-1310)
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 Windows kernel-mode driver. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.
4) Buffer overflow (CVE-ID: CVE-2020-1251)
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 Windows kernel-mode driver. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.
5) Buffer overflow (CVE-ID: CVE-2020-1253)
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 Windows kernel-mode driver. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.
6) Out-of-bounds read (CVE-ID: CVE-2020-1290)
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-2020-1207
- https://www.zerodayinitiative.com/advisories/ZDI-20-692/
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1247
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1310
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1251
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1253
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1290