SB2020031110 - Privilege escalation in Windows Installer

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Main Vulnerability Database SB2020031110

SB2020031110 - Privilege escalation in Windows Installer

Published: March 11, 2020

Security Bulletin ID SB2020031110
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Link following (CVE-ID: CVE-2020-0779)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

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 insecure processing of symbolic links in MSI packages within the Windows Installer. A local user can create a specially crafted symbolic link and elevate privileges on the system.


2) Insecure DLL loading (CVE-ID: CVE-2020-0798)

CWE-ID: CWE-427 - Uncontrolled Search Path Element

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 Windows Installer fails to properly sanitize input leading to an insecure library loading behavior. A local user can place a malicious library on the affected filesystem and escalate privileges on the system.


3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0814)

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:P/U:Clear


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

The vulnerability exists due to the way Windows Installer handles certain filesystem operations. A local user can escalate privileges on the system.


4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0842)

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 the way Windows Installer handles certain filesystem operations. A local user can escalate privileges on the system.


5) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0843)

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 the way Windows Installer handles certain filesystem operations. A local user can escalate privileges on the system.


Remediation

Install update from vendor's website.

References