#VU69097 Permissions, Privileges, and Access Controls in Microsoft Exchange Server - CVE-2022-41080

Vulnerability identifier: #VU69097

Vulnerability risk: High

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

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: 2013 Cumulative Update 2 15.00.0712.024 - 2013 CU23 Oct22SU 15.00.1497.042, 2016 Cumulative Update 1 15.01.0396.030 - 2016 CU23 Oct22SU 15.01.2507.013, 2019 Cumulative Update 1 15.02.0330.005 - 2019 RTM 15.02.0221.012

---

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

---

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.