CVE-2020-3511

published 2020-09-24

CVE-2020-3511: A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an…

high 7.4 CVSS 3.1

AV A AC L PR N UI N S C C N I N A H

A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_ios	—	—
cisco	ios_and_ios_xe	—	—
cisco	ios_xe	—	—

CWE-20