CVE-2020-3566Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory of an affected device. The vulnerability is due to insufficient queue management for Internet Group Management Protocol (IGMP) packets. An attacker could exploit this vulnerability by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to cause memory exhaustion, resulting in instability of other processes. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address this vulnerability.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.6 | HIGH | 3.1cisco (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| 7.8 | HIGH | 2.0NVD | AV:N/AC:L/Au:N/C:N/I:N/A:C |
CISA required action
⚡ Known exploited · remediation due May 3, 2022
Apply updates per vendor instructions.
Details
- CVE ID
- CVE-2020-3566
- Status
- Analyzed
- Assigner (CNA)
- cisco
- Published
- Aug 29, 2020
- Last modified
- 2026-06-17 03:18 UTC
Affected Products
As published by the CNA in the CVE record.
CiscoCisco IOS XR Software0 version ranges
No version detail published.