Microsoft Exchange Server zero day vulnerabilities

September 30, 2022

SonicWall Capture Labs Threat Research team is investigating following vulnerabilities in the Microsoft Exchange Server that are being exploited in the wild. First CVE-2022-41040 is a Server-Side Request Forgery (SSRF) vulnerability and the second, identified as CVE-2022-41082 allows remote code execution (RCE).

Microsoft Exchange Server 2013, 2016, and 2019 are vulnerable to these attacks. CVE-2022-41040 can enable an authenticated attacker to remotely trigger CVE-2022-41082. Authenticated access to the vulnerable Exchange Server is necessary to successfully exploit either of the two vulnerabilities.

Microsoft has outlined some mitigations here

SonicWall Capture Labs provides protection against this threat via following signatures:

  • IPS 15499 :Microsoft Exchange Server SSRF (CVE-2022-41040)
  • IPS 15660 :autodiscover.json Access

In order to detect the exploitation of this vulnerability over HTTPS, server DPISSL needs to be enabled.
Please check for updates as we continue to monitor this threat.