CVE-2022-20946

A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a memory handling error that occurs when GRE traffic is processed. An attacker could exploit this vulnerability by sending a crafted GRE payload through an affected device. A successful exploit could allow the attacker to cause the device to restart, resulting in a DoS condition. https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-gre-dos-hmedHQPM ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-gre-dos-hmedHQPM"] This advisory is part of the November 2022 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication.

• cisco secure firewall threat defense (>= 6.3.0 <= 6.3.0.5) • cisco secure firewall threat defense (>= 6.4.0 <= 6.4.0.15) • cisco secure firewall threat defense (>= 6.5.0 <= 6.5.0.5) • cisco secure firewall threat defense (>= 6.6.0 <= 6.6.5.2) • cisco secure firewall threat defense (>= 6.7.0 <= 6.7.0.3) • cisco secure firewall threat defense (>= 7.0.0 <= 7.0.3) • cisco secure firewall threat defense 7.1.0.0 • cisco secure firewall threat defense 7.1.0.1 • cisco secure firewall threat defense 7.1.0.2