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CVE-2018-0189

CVE information

Published

4 years ago

Last Modified

3 years ago

CVSSv2.0 Severity

High

CVSSv3.1 Severity

Medium

Impact Analysis

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..

CVSSv2.0 Score

Severity
High
Base Score
7.1/10
Exploit Score
8.6/10
Access Vector
Network
Access Complexity
Medium
Authentication Required
None
Impact Score
6.9/10
Confidentiality Impact
None
Availability Impact
Complete
Integrity Impact
None

CVSSv3.1 Score

Severity
Medium
Base Score
5.3/10
Exploit Score
1.6/10
Access Vector
Network
Access Complexity
High
Privileges Required
Low
Impact Score
3.6/10
Confidentiality Impact
None
Availability Impact
High
Integrity Impact
None
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.5\(3\)s5
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.5\(3\)m5
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.4\(3\)s7
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.4\(2\)s1
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.4\(1\)s1
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.4\(1\)s0a
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.2\(5\)e1
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.2\(4\)e5
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.2\(2\)e1
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
  Yes
- 15.2\(1\)e1