description: A vulnerability in the SSL file policy implementation of Cisco Firepower Threat Defense (FTD) Software that occurs when the SSL/TLS connection is configured with a URL Category and the Snort 3 detection engine could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to unexpectedly restart. This vulnerability exists because a logic error occurs when a Snort 3 detection engine inspects an SSL/TLS connection that has either a URL Category configured on the SSL file policy or a URL Category configured on an access control policy with TLS server identity discovery enabled. Under specific, time-based constraints, an attacker could exploit this vulnerability by sending a crafted SSL/TLS connection through an affected device. A successful exploit could allow the attacker to trigger an unexpected reload of the Snort 3 detection engine, resulting in either a bypass or denial of service (DoS) condition, depending on device configuration. The Snort 3 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: 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: 7.1.0, status: affected
version: 7.1.0.1, status: affected
version: 7.1.0.2, status: affected
version: 7.1.0.3, status: affected
version: 7.2.0, status: affected
version: 7.2.0.1, status: affected
version: 7.2.1, status: affected
version: 7.2.2, status: affected
version: 7.2.3, status: affected
version: 7.3.0, status: affected
version: 7.3.1, status: affected
version: 7.3.1.1, 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:N/A:L
baseScore: 4
baseSeverity: MEDIUM
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: NONE
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: LOW
]
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.