CVE-2020-3511
Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability
- State
- Published
- Severity
- 7.4 High
- Published
- Sep 24, 2020
- Updated
- Nov 13, 2024
- Reserved
- Dec 12, 2019
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.0 | 7.4 High | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | cisco |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Cisco IOSCisco |
|
References
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