description: A vulnerability in the SSL/TLS certificate handling of Snort 3 Detection Engine integration with Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to restart. This vulnerability is due to a logic error that occurs when an SSL/TLS certificate that is under load is accessed when it is initiating an SSL connection. Under specific, time-based constraints, an attacker could exploit this vulnerability by sending a high rate of SSL/TLS connection requests to be inspected by the Snort 3 detection engine on an affected device. A successful exploit could allow the attacker to cause the Snort 3 detection engine to reload, resulting in either a bypass or a denial of service (DoS) condition, depending on device configuration. The Snort detection engine will restart automatically. No manual intervention is required.
problem types: Improper Clearing of Heap Memory Before Release ('Heap Inspection')
affected:
{
vendor: Cisco
product: Cisco Firepower Threat Defense Software
versions:
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: 7.0.4, status: affected
version: 7.0.5, status: affected
version: 7.2.0, status: affected
version: 7.2.0.1, status: affected
}
metrics:
format: cvssV3_1
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
baseScore: 4
baseSeverity: MEDIUM
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: NONE
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: LOW
availabilityImpact: NONE
]
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.