Microsoft Exchange Server zero day vulnerabilities

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.

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The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.