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 …
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Ios Xe | before 15.5\(3\)s5 before 15.5\(3\)m5 before 15.4\(3\)s7 before 15.4\(2\)s1 before 15.4\(1\)s1 before 15.4\(1\)s0a |