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Cisco IOS: CVE-2020-3511: Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability

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Cisco IOS: CVE-2020-3511: Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability

Severity
6
CVSS
(AV:A/AC:L/Au:N/C:N/I:N/A:C)
Published
09/25/2020
Created
09/26/2020
Added
09/25/2020
Modified
04/29/2024

Description

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.

Solution(s)

  • cisco-ios-upgrade-latest

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