ZDI-CAN-13611: (Pwn2Own) Microsoft Exchange Server Autodiscover Server Side Request Forgery Authentication Bypass Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Exchange Server. Authentication is not required to exploit this vulnerability. The specific flaw exists within the Autodiscover service. The issue results from the lack of proper validation of URI prior to accessing resources. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of SYSTEM.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Exchange |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-CAN-13611?
ZDI-CAN-13611 is considered critical as it allows remote code execution without authentication.
How do I fix ZDI-CAN-13611?
To fix ZDI-CAN-13611, apply the latest security updates provided by Microsoft for Exchange Server.
Who is affected by ZDI-CAN-13611?
Any organization using affected installations of Microsoft Exchange Server is vulnerable to ZDI-CAN-13611.
Can ZDI-CAN-13611 be exploited remotely?
Yes, ZDI-CAN-13611 can be exploited remotely without requiring authentication.
What specific component of Microsoft Exchange Server is vulnerable in ZDI-CAN-13611?
The specific component vulnerable in ZDI-CAN-13611 is the Autodiscover service.
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- alias/CVE-2021-34473
- agent/software-canonical-lookup
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- vendor/microsoft
- canonical/microsoft exchange