CVE-2020-3569 KEV
Patch first
On CISA KEV — known exploited in the wild, due 2022-05-03.
Description
Multiple vulnerabilities in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to either immediately crash the Internet Group Management Protocol (IGMP) process or make it consume available memory and eventually crash. The memory consumption may negatively impact other processes that are running on the device. These vulnerabilities are due to the incorrect handling of IGMP packets. An attacker could exploit these vulnerabilities by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to immediately crash the IGMP process or cause memory exhaustion, resulting in other processes becoming unstable. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address these vulnerabilities.
Scoring
| CVSS | 8.6 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| EPSS | 3.32% — more likely to be exploited than 88% of all CVEs |
| Weakness | CWE-400 |
| On CISA KEV | yes — remediate by 2022-05-03 |
| Public exploit | none known |
| Published | 2020-09-23 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability |
|---|---|
| Added | 2021-11-03 |
| Due | 2022-05-03 |
| Vendor / product | Cisco / IOS XR |
| Ransomware use | none reported |
Affected (40)
| Vendor | Product |
|---|---|
| cisco | asr 9000v |
| cisco | asr 9001 |
| cisco | asr 9006 |
| cisco | asr 9010 |
| cisco | asr 9901 |
| cisco | asr 9903 |
| cisco | asr 9904 |
| cisco | asr 9906 |
| cisco | asr 9910 |
| cisco | asr 9912 |
| cisco | asr 9922 |
| cisco | crs |
| cisco | crs-1 16-slot line card chassis |
| cisco | crs-1 16-slot single-shelf system |
| cisco | crs-1 4-slot single-shelf system |
| cisco | crs-1 8-slot line card chassis |
| cisco | crs-1 8-slot single-shelf system |
| cisco | crs-1 fabric card chassis |
| cisco | crs-1 line card chassis \(dual\) |
| cisco | crs-1 line card chassis \(multi\) |
| cisco | crs-1 multishelf system |
| cisco | crs-3 16-slot single-shelf system |
| cisco | crs-3 4-slot single-shelf system |
| cisco | crs-3 8-slot single-shelf system |
| cisco | crs-3 multishelf system |
| cisco | crs-8\/s-b crs |
| cisco | crs-8\/scrs |
| cisco | crs-x |
| cisco | ios xr |
| cisco | ncs 5001 |
| cisco | ncs 5002 |
| cisco | ncs 5011 |
| cisco | ncs 520 |
| cisco | ncs 540 |
| cisco | ncs 5501 |
| cisco | ncs 5502 |
| cisco | ncs 5508 |
| cisco | ncs 5516 |
| cisco | ncs 560 |
| cisco | ncs 6008 |
References
→ the Explorer · watch your stack · NVD