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Cisco XE: CVE-2018-0189: Cisco IOS and IOS XE Software Forwarding Information Base Denial of Service Vulnerability

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Cisco XE: CVE-2018-0189: Cisco IOS and IOS XE Software Forwarding Information Base Denial of Service Vulnerability

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:N/I:N/A:C)
Published
03/28/2018
Created
08/02/2019
Added
07/30/2019
Modified
01/05/2024

Description

A vulnerability in the Forwarding Information Base (FIB) code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, network attacker to cause a denial of service (DoS) condition. The vulnerability is due to a limitation in the way the FIB is internally representing recursive routes. An attacker could exploit this vulnerability by injecting routes into the routing protocol that have a specific recursive pattern. The attacker must be in a position on the network that provides the ability to inject a number of recursive routes with a specific pattern. An exploit could allow the attacker to cause an affected device to reload, creating a DoS condition. Cisco Bug IDs: CSCva91655.

Solution(s)

  • cisco-xe-upgrade-latest

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