Oct 2022: Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2022-41040 Published on October 3, 2022
Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability
Known Exploited Vulnerability
This Microsoft Exchange Server Server-Side Request Forgery Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Microsoft Exchange Server allows for server-side request forgery. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41082 which allows for remote code execution.
The following remediation steps are recommended / required by October 21, 2022: Apply updates per vendor instructions.
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2022-41040 has been classified to as a SSRF vulnerability or weakness.
Products Associated with CVE-2022-41040
Want to know whenever a new CVE is published for Microsoft Exchange Server? stack.watch will email you.
Affected Versions
Microsoft Exchange Server 2013 Cumulative Update 23:- Version 15.00.0 and below 15.00.1497.044 is affected.
- Version 15.0.0 and below 15.01.2375.037 is affected.
- Version 15.02.0 and below 15.02.0986.036 is affected.
- Version 15.02.0 and below 15.02.1118.020 is affected.
- Version 15.01.0 and below 15.01.2507.016 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.