CVE-2021-34473 Scanner

Microsoft Exchange Server products are designed for organizations that require secure and efficient messaging. Microsoft Exchange Server 2013, Microsoft Exchange Server 2019, and Microsoft Exchange Server 2016 are widely used worldwide. These products serve as a communication hub that enables users to send and receive emails, manage calendars, contacts, and tasks, among other features. The Microsoft Exchange Server is an on-premises email server that is used by many organizations worldwide.

CVE-2021-34473 is a remote code execution vulnerability detected in Microsoft Exchange Server. This vulnerability is similar to the previous exploits that targeted the Exchange Server earlier this year, including CVE-2021-31196 and CVE-2021-31206. The vulnerability is caused by the Exchange Security Feature Bypass that allows an attacker to execute arbitrary code on the server with SYSTEM privileges. The attacker could take complete control over the Exchange Server, read or modify sensitive data, and install malware.

This vulnerability can lead to severe consequences for organizations using Microsoft Exchange Server products. Attackers can execute harmful codes, install malware, steal sensitive data, and spread the malware across the network of the affected organization. The damage caused by such attacks can be costly, involving not only financial losses but also reputational damage and loss of productivity for the organization.

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REFERENCES

• http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34473
• https://www.zerodayinitiative.com/advisories/ZDI-21-821/