Vulnerability identifier: #VU66301

Vulnerability risk: Medium

CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-30134

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Exchange Server
Server applications / Mail servers

Vendor: Microsoft

Description

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote user can bypass implemented security restrictions and read targeted email messages.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2019 Preview 15.02.0196.000 - 2019 Cumulative Update 12 May22SU 15.02.1118.009, 2016 Preview 15.01.0225.016 - 2016 Cumulative Update 23 May22SU 15.01.2507.009, 2013 RTM 15.00.0516.032 - 2013 Cumulative Update 23 May22SU 15.00.1497.036

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External links
http://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-30134

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.