CVE-2020-1391: Windows Agent Activation Runtime Information Disclosure Vulnerability

Overview

Severity

Medium (CVSS 5.5)

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2020-Jul

Released

2020-07-14

EPSS Score

0.88% (percentile: 75.4%)

Description

An information disclosure vulnerability exists when the Windows Agent Activation Runtime (AarSvc) fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application. The update addresses the vulnerability by correcting how the Windows Agent Activation Runtime handles objects in memory.

FAQ

What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is sensitive information.

Affected Products (12)

Windows

• Windows 10 Version 2004 for 32-bit Systems
• Windows 10 Version 2004 for ARM64-based Systems
• Windows 10 Version 2004 for x64-based Systems
• Windows Server, version 2004 (Server Core installation)
• Windows 10 Version 1909 for 32-bit Systems
• Windows 10 Version 1909 for x64-based Systems
• Windows 10 Version 1909 for ARM64-based Systems
• Windows Server, version 1909 (Server Core installation)
• Windows 10 Version 1903 for 32-bit Systems
• Windows 10 Version 1903 for x64-based Systems
• Windows 10 Version 1903 for ARM64-based Systems
• Windows Server, version 1903 (Server Core installation)

Security Updates (2)

• 4565503
• 4565483

Acknowledgments

Anonymous researcher

Revision History

• 2020-07-14: Information published.