National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-0189 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.3 MEDIUM
Vector: AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.6


Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.1 HIGH
Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.securityfocus.com/bid/103548 Third Party Advisory VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-FIB-dos Vendor Advisory

Technical Details

Vulnerability Type (View All)

  • Resource Management Errors (CWE-399)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.5(3)s5

Configuration 2 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.5(3)m5

Configuration 3 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.4(3)s7

Configuration 4 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.4(2)s1

Configuration 5 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.4(1)s1

Configuration 6 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.4(1)s0a

Configuration 7 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.2(5)e1

Configuration 8 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.2(4)e5

Configuration 9 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.2(2)e1

Configuration 10 ( hide )
 cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
15.2(1)e1


Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-0189
NVD Published Date:
03/28/2018
NVD Last Modified:
04/20/2018