CVE-2021-34753

Summary

CVE-2021-34753 is a vulnerability affecting Cisco Firepower Threat Defense (FTD) Software. It allows unauthenticated, remote attackers to bypass configured rules for Ethernet Industrial Protocol (ENIP) traffic. The vulnerability arises from incomplete processing during deep packet inspection for ENIP packets. An adversary can exploit this weakness by sending a specially crafted ENIP packet to the targeted interface, potentially bypassing access control and intrusion policies. Successful exploitation could lead to unauthorized access to the affected system.

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