title: Cisco Aggregation Services Router 900 Route Switch Processor 3 OSPFv2 Denial of Service Vulnerability
description: A vulnerability in the ingress traffic validation of Cisco IOS XE Software for Cisco Aggregation Services Router (ASR) 900 Route Switch Processor 3 (RSP3) could allow an unauthenticated, adjacent attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the software insufficiently validates ingress traffic on the ASIC used on the RSP3 platform. An attacker could exploit this vulnerability by sending a malformed OSPF version 2 (OSPFv2) message to an affected device. A successful exploit could allow the attacker to cause a reload of the iosd process, triggering a reload of the affected device and resulting in a DoS condition.
problem types: CWE-20
affected:
{
product: Cisco IOS XE Software
vendor: Cisco
versions:
status: affected, version: 3.13.6aS
status: affected, version: 3.16.0aS
status: affected, version: 3.16.1aS
status: affected, version: 3.16.2aS
status: affected, version: 3.16.3aS
status: affected, version: 3.16.4S
status: affected, version: 3.16.4bS
status: affected, version: 3.16.4gS
status: affected, version: 3.16.5S
status: affected, version: 3.16.4cS
status: affected, version: 3.16.4dS
status: affected, version: 3.16.4eS
status: affected, version: 3.16.6S
status: affected, version: 3.16.5aS
status: affected, version: 3.16.7S
status: affected, version: 3.16.6bS
status: affected, version: 3.16.7bS
status: affected, version: 3.16.8S
status: affected, version: 3.17.0S
status: affected, version: 3.17.1S
status: affected, version: 3.17.2S
status: affected, version: 3.17.3S
status: affected, version: 3.17.4S
status: affected, version: 16.5.1
status: affected, version: 16.5.2
status: affected, version: 16.5.3
status: affected, version: 3.18.0S
status: affected, version: 3.18.1S
status: affected, version: 3.18.2S
status: affected, version: 3.18.3S
status: affected, version: 3.18.4S
status: affected, version: 3.18.0SP
status: affected, version: 3.18.1SP
status: affected, version: 3.18.1gSP
status: affected, version: 3.18.1bSP
status: affected, version: 3.18.2SP
status: affected, version: 3.18.1hSP
status: affected, version: 3.18.1iSP
status: affected, version: 3.18.3SP
status: affected, version: 3.18.4SP
status: affected, version: 16.6.1
status: affected, version: 16.6.2
status: affected, version: 16.6.3
status: affected, version: 16.6.4
status: affected, version: 16.7.1
status: affected, version: 16.7.2
status: affected, version: 16.8.1
status: affected, version: 16.8.1b
status: affected, version: 16.8.1c
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: HIGH
baseScore: 7.4
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:A/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.