Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2020-3510

Severity CVSS v4.0:
Pending analysis
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
24/09/2020
Last modified:
08/10/2020

Description

A vulnerability in the Umbrella Connector component of Cisco IOS XE Software for Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to trigger a reload, resulting in a denial of service condition on an affected device. The vulnerability is due to insufficient error handling when parsing DNS requests. An attacker could exploit this vulnerability by sending a series of malicious DNS requests to an Umbrella Connector client interface of an affected device. A successful exploit could allow the attacker to cause a crash of the iosd process, which triggers a reload of the affected device.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.60 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

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

Base Score 3.x
8.60
Severity 3.x
HIGH
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:16.12.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200-24p:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200-24t:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200-48p:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200-48t:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200l-24p-4g:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200l-24p-4x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200l-24pxg-2y:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200l-24pxg-4x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200l-24t-4g:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200l-24t-4x:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200l-48p-4g:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:catalyst_c9200l-48p-4x:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools