CVE-2018-0189

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.

• cisco ios xe (< 15.5\(3\)s5) • cisco ios xe (< 15.5\(3\)m5) • cisco ios xe (< 15.4\(3\)s7) • cisco ios xe (< 15.4\(2\)s1) • cisco ios xe (< 15.4\(1\)s1) • cisco ios xe (< 15.4\(1\)s0a) • cisco ios xe (< 15.2\(5\)e1) • cisco ios xe (< 15.2\(4\)e5) • cisco ios xe (< 15.2\(2\)e1) • cisco ios xe (< 15.2\(1\)e1)