Vulnerability identifier: #VU69097

Vulnerability risk: High

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-41080

CWE-ID: CWE-264

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 escalate privileges.

The vulnerability exists due to application does not properly impose security restrictions. A remote authenticated user can escalate privileges within the Exchange server.

Note, this vulnerability is suspected to be used in a new exploit method bypasses URL rewrite mitigations for the Autodiscover endpoint provided by Microsoft in response to ProxyNotShell.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2019 Preview 15.02.0196.000 - 2019 CU12 Oct22SU 15.02.1118.015, 2016 Preview 15.01.0225.016 - 2016 CU23 Oct22SU 15.01.2507.013, 2013 RTM 15.00.0516.032 - 2013 CU23 Oct22SU 15.00.1497.042

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41080
http://www.crowdstrike.com/blog/owassrf-exploit-analysis-and-recommendations/

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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?

Yes. This vulnerability is being exploited in the wild.