CVE-2020-3511

MEDIUM

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.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-isdn-q931-dos-67eUZBTf

Details

Source: MITRE

Published: 2020-09-24

Updated: 2020-10-08

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 6.1

Vector: AV:A/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 6.5

Severity: MEDIUM

CVSS v3.0

Base Score: 7.4

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

Impact Score: 4

Exploitability Score: 2.8

Severity: HIGH