SB2020111038 - Multiple vulnerabilities in Microsoft Win32k

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-17038)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in Win32k, which leads to security restrictions bypass and privilege escalation.

2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-17057)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in Windows Win32k, which leads to security restrictions bypass and privilege escalation.

3) Information disclosure (CVE-ID: CVE-2020-17013)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in Windows Win32k. A local user can gain unauthorized access to sensitive information on the system.

4) Use-after-free (CVE-ID: CVE-2020-17010)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in CInteractionTrackerMarshaler within DirectComposition. A local user can run a specially crafted program and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17038
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17057
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17013
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17010