description: 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.
problem types: Heap-based Buffer Overflow
affected:
{
vendor: Cisco
product: Cisco Firepower Threat Defense Software
versions:
version: 6.6.0, status: affected
version: 6.6.0.1, status: affected
version: 6.6.1, status: affected
version: 6.6.3, status: affected
version: 6.6.4, status: affected
version: 6.6.5, status: affected
version: 6.6.5.1, status: affected
version: 6.6.5.2, status: affected
version: 6.4.0, status: affected
version: 6.4.0.1, status: affected
version: 6.4.0.3, status: affected
version: 6.4.0.2, status: affected
version: 6.4.0.4, status: affected
version: 6.4.0.5, status: affected
version: 6.4.0.6, status: affected
version: 6.4.0.7, status: affected
version: 6.4.0.8, status: affected
version: 6.4.0.9, status: affected
version: 6.4.0.10, status: affected
version: 6.4.0.11, status: affected
version: 6.4.0.12, status: affected
version: 6.4.0.13, status: affected
version: 6.4.0.14, status: affected
version: 6.4.0.15, status: affected
version: 6.7.0, status: affected
version: 6.7.0.1, status: affected
version: 6.7.0.2, status: affected
version: 6.7.0.3, status: affected
version: 7.0.0, status: affected
version: 7.0.0.1, status: affected
version: 7.0.1, status: affected
version: 7.0.1.1, status: affected
version: 7.0.2, status: affected
version: 7.0.2.1, status: affected
version: 7.0.3, status: affected
version: 7.1.0, status: affected
version: 7.1.0.1, status: affected
version: 7.1.0.2, status: affected
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
baseScore: 8.6
baseSeverity: HIGH
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
]
exploits: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.