![]() ![]() 'Microsoft Security Response Center', # Discovery of exploitation in the wild 'Microsoft Threat Intelligence Center', # Discovery of exploitation in the wild 'zcgonvh', # Of 360 noah lab, Original Bug Discovery Tested against Exchange Server 2019 CU11 SU0 on Windows Server 2019,Īnd Exchange Server 2016 CU22 SU0 on Windows Server 2016. instead of the proper value ofīy leveraging this vulnerability, attacks can bypass theĬhainedSerializationBinder's deserialization deny list The specific flaw exists due to the fact that the deny list for theĬhainedSerializationBinder had a typo whereby an entry was typo'd as Note that authentication is required to exploit this vulnerability. Security Update 3, and Exchange Server 2016 CU22 prior to Prior to Security Update 2, Exchange Server 2016 CU21 prior to ![]() On Exchange Server 2019 CU10 prior to Security Update 3, Exchange Server 2019 CU11 This vulnerability allows remote attackers to execute arbitrary code tags | exploit, remote, arbitrary systems | windows advisories | CVE-2021-42321 SHA-256 | 12eb99965a3f9b7bfde5c2c3d85628bf4f85bbe42475b654e2c35b7e33a8ccaa Download | Favorite | ViewĬlass MetasploitModule 'Microsoft Exchange Server ChainedSerializationBinder Deny List Typo RCE', Tested against Exchange Server 2019 CU11 SU0 on Windows Server 2019, and Exchange Server 2016 CU22 SU0 on Windows Server 2016. By leveraging this vulnerability, attacks can bypass the ChainedSerializationBinder's deserialization deny list and execute code as NT AUTHORITY\SYSTEM. The specific flaw exists due to the fact that the deny list for the ChainedSerializationBinder had a typo whereby an entry was typo'd as instead of the proper value of. This Metasploit module allows remote attackers to execute arbitrary code on Exchange Server 2019 CU10 prior to Security Update 3, Exchange Server 2019 CU11 prior to Security Update 2, Exchange Server 2016 CU21 prior to Security Update 3, and Exchange Server 2016 CU22 prior to Security Update 2. Microsoft Exchange Server Remote Code Execution Microsoft Exchange Server Remote Code Execution Posted Authored by zcgonvh, Grant Willcox, testanull, PeterJson, Microsoft Threat Intelligence Center, Microsoft Security Response Center, pwnforsp | Site ![]()
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