Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2018-0189

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
28/03/2018
Last modified:
09/10/2019

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.

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.30 MEDIUM
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
5.30
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete

Base Score 2.0
7.10
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.5\(3\)s5 (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.5\(3\)m5 (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.4\(3\)s7 (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.4\(2\)s1 (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.4\(1\)s1 (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.4\(1\)s0a (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.2\(5\)e1 (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.2\(4\)e5 (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.2\(2\)e1 (excluding)
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 15.2\(1\)e1 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools