CVE-2020-17143: Microsoft Exchange Server Information Disclosure Vulnerability

Overview

Severity

High (CVSS 8.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2020-Dec

Released

2020-12-08

EPSS Score

79.25% (percentile: 99.1%)

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 (5)

Server Software

• Microsoft Exchange Server 2019 Cumulative Update 6
• Microsoft Exchange Server 2016 Cumulative Update 17
• Microsoft Exchange Server 2019 Cumulative Update 7
• Microsoft Exchange Server 2016 Cumulative Update 18
• Microsoft Exchange Server 2013 Cumulative Update 23

Security Updates (5)

• 4593465
• 4593465
• 4593465
• 4593465
• 4593466

Acknowledgments

Steven Seeley (mr_me) of <a href="https://srcincite.io/">Source Incite</a>

Revision History

• 2020-12-08: Information published.