CVE-2022-30134: Microsoft Exchange Server Information Disclosure Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Unlikely

Publicly Disclosed

Yes

Patch Tuesday

2022-Aug

Released

2022-08-09

Last Updated

2022-10-11

EPSS Score

2.26% (percentile: 84.6%)

FAQ

What type of information could be disclosed by this vulnerability? An attacker who successfully exploited the vulnerability could read targeted email messages. Are there any more actions I need to take to be protected from this vulnerability? Yes. Customers running an affected version of Microsoft Exchange need to enable Extended Protection to be protected from this vulnerability. For more information, see Exchange Server Support for Windows Extended Protection. Is there more information available about this release of Exchange Server? For more information on this issue, please see The Exchange Blog. According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability? Any authenticated user could trigger this vulnerability. It does not require admin or other elevated privileges.

Affected Products (5)

Server Software

• Microsoft Exchange Server 2019 Cumulative Update 12
• Microsoft Exchange Server 2016 Cumulative Update 23
• Microsoft Exchange Server 2013 Cumulative Update 23
• Microsoft Exchange Server 2016 Cumulative Update 22
• Microsoft Exchange Server 2019 Cumulative Update 11

Security Updates (5)

• 5019077
• 5019077
• 5019076
• 5019077
• 5019077

Acknowledgments

Anonymous

Revision History

• 2022-08-09: Information published.
• 2022-09-20: Added FAQ information. This is an informational change only.
• 2022-10-11: To address known issue of Outlook Probes not functioning properly with extended protection turned on, Microsoft has updated the Microsoft Exchange security updates. Please see the Exchange Team Blog for more information.