title: Cisco IOS XE Software Encrypted Traffic Analytics Denial of Service Vulnerability
description: A vulnerability in the Cisco Encrypted Traffic Analytics (ETA) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an internal data structure after it has been freed. An attacker could exploit this vulnerability by sending crafted, malformed IP packets to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition.
problem types: CWE-20
affected:
{
product: Cisco IOS XE Software
vendor: Cisco
versions:
status: affected, version: 3.2.0JA
status: affected, version: 16.6.1
status: affected, version: 16.6.2
status: affected, version: 16.6.3
status: affected, version: 16.7.1
status: affected, version: 16.7.1a
status: affected, version: 16.7.1b
status: affected, version: 16.8.1
status: affected, version: 16.8.1a
status: affected, version: 16.8.1b
status: affected, version: 16.8.1s
status: affected, version: 16.8.1c
status: affected, version: 16.8.1d
status: affected, version: 16.8.1e
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.6
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
version: 3.0
]
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.