CVE-2020-0839: Windows dnsrslvr.dll 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-Sep

Released

2020-09-08

EPSS Score

0.28% (percentile: 51.3%)

Description

An elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions. To exploit the vulnerability, a locally authenticated attacker could run a specially crafted application. The security update addresses the vulnerability by ensuring the dnsrslvr.dll properly handles objects in memory.

Affected Products (29)

Other

• 11766
• 11767
• 11768
• 11769
• 11497
• 11498
• 11563
• 11568
• 11569
• 11570
• 11571
• 11572
• 11712
• 11713
• 11714
• 11715
• 11453
• 11454
• 11583
• 11644
• 11645
• 11646
• 11647
• 10729
• 10735
• 10852
• 10853
• 10816
• 10855

Security Updates (7)

• 4571756
• 4577032
• 4570333
• 4574727
• 4577041
• 4577049
• 4577015

Acknowledgments

pgboy (http://weibo.com/pgboy1988)

Revision History

• 2020-09-08: Information published.