OWASSRF: New Exploit Method Identified for Exchange Bypassing ProxyNotShell Mitigations

Originally published by CrowdStrike. CrowdStrike recently discovered a new exploit method (called OWASSRF) consisting of CVE-2022-41080 and CVE-2022-41082 to achieve remote code execution (RCE) through Outlook Web Access (OWA). The new exploit method bypasses URL rewrite mitigations for the Autodiscover endpoint provided by Microsoft in response to ProxyNotShell.The discovery was part of recent CrowdStrike Services investigations into several Play ransomware intrusions where the common entry ...

access bypassing called code code execution crowdstrike cve cve-2022-41080 cve-2022-41082 discovery endpoint entry exchange exploit investigations microsoft mitigations outlook owa owassrf play play ransomware ransomware rce remote code remote code execution response services url web