CVE-2020-16920: Windows Application Compatibility Client Library Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2020-Oct

Released

2020-10-13

EPSS Score

12.78% (percentile: 94.0%)

Description

An elevation of privilege vulnerability exists when the Windows Application Compatibility Client Library improperly handles registry operations. An attacker who successfully exploited this vulnerability could gain elevated privileges. To exploit the vulnerability, an attacker would first need code execution on a victim system. An attacker could then run a specially crafted application. The security update addresses the vulnerability by ensuring the Windows Application Compatibility Client Library properly handles registry operations.

Affected Products (40)

Other

• 11497
• 11498
• 11563
• 11568
• 11569
• 11570
• 11571
• 11572
• 11712
• 11713
• 11714
• 11715
• 11453
• 11454
• 11583
• 11644
• 11645
• 11646
• 11647
• 11766
• 11767
• 11768
• 11769
• 10729
• 10735
• 10852
• 10853
• 10816
• 10855
• 10047
• 10048
• 10481
• 10482
• 10484
• 10051
• 10049
• 10378
• 10379
• 10483
• 10543

Security Updates (13)

• 4580330
• 4577668
• 4577671
• 4580328
• 4579311
• 4580327
• 4580346
• 4580345
• 4580387
• 4580347
• 4580358
• 4580382
• 4580353

Acknowledgments

Feeker Wang from Codesafe Team of Legendsec at Qi'anxin Group

Revision History

• 2020-10-13: Information published.