Link following in Microsoft Windows and Windows Server - CVE-2020-0779

Vulnerability identifier: #VU25972

CSH Severity: Low

CVSS v4: 8.5 [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]

CVE-ID: CVE-2020-0779

CWE-ID: CWE-59

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Microsoft Windows
Windows Server
Solutions Enabler Virtual Appliance
Solutions Enabler
Unisphere for PowerMax Virtual Appliance
Unisphere for PowerMax

Install updates from vendor's website.

Solutions Enabler Virtual Appliance - addressed in versions 9.0.0.19, 9.1.0.6
Solutions Enabler - addressed in versions 9.0.0.19, 9.1.0.6
Unisphere for PowerMax Virtual Appliance - addressed in versions 9.0.2.18, 9.1.0.17
Unisphere for PowerMax - addressed in versions 9.0.2.18, 9.1.0.17

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0779

• Privilege escalation in Windows Installer
• Multiple vulnerabilities in Dell EMC Unisphere for PowerMax and Dell EMC Solutions Enabler