SB2020111038 - Multiple vulnerabilities in Microsoft Win32k

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Main Vulnerability Database SB2020111038

SB2020111038 - Multiple vulnerabilities in Microsoft Win32k

Published: November 10, 2020 Updated: December 14, 2020

Security Bulletin ID SB2020111038
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


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

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear


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)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


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)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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