#VU67770 Server-Side Request Forgery (SSRF) in Microsoft Exchange Server - CVE-2022-41040
Vulnerability identifier: #VU67770
Vulnerability risk: Critical
CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:L/SI:N/SA:N/E:A/U:Red]
CVE-ID:
CWE-ID:
CWE-918
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Microsoft Exchange Server
Server applications /
Mail servers
Vendor: Microsoft
Description
The disclosed vulnerability allows a remote user to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input within the Exchange OWA Autodiscover service.. A remote user can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker to execute arbitrary code on the target system.
Note, the vulnerability is being actively exploited in the wild.
Mitigation
Install update 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://gteltsc.vn/blog/warning-new-attack-campaign-utilized-a-new-0day-rce-vulnerability-on-microsoft-exchange-server-12715.html
https://msrc-blog.microsoft.com/2022/09/29/customer-guidance-for-reported-zero-day-vulnerabilities-in-microsoft-exchange-server/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41040
https://www.zerodayinitiative.com/advisories/ZDI-22-1441/
https://www.zerodayinitiative.com/advisories/ZDI-22-1595/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
