What is CVE-2020-3569?

CVE-2020-3569 is a high-severity vulnerability in Cisco Asr 9000v, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2020-09-23.

How severe is CVE-2020-3569?

High severity. CVSS v3 base score is 8.6 out of 10.

Is CVE-2020-3569 known to be exploited?

Yes. CVE-2020-3569 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.

Resource exhaustion in Cisco Asr 9000v

CVE-2020-3569

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.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.033 (87.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Mitigation, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2020-3569?: CVE-2020-3569 is a high-severity vulnerability in Cisco Asr 9000v, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2020-09-23.
How severe is CVE-2020-3569?: High severity. CVSS v3 base score is 8.6 out of 10.
Is CVE-2020-3569 known to be exploited?: Yes. CVE-2020-3569 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.