CVE-2020-3569: Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability

CVE-2020-3569 · Severity: critical · CVSS 8.6 · Exploited in the wild · Published 2021-11-03

A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software allows unauthenticated remote attackers to cause a denial of service. By sending crafted IGMP packets, an attacker can crash the IGMP process or exhaust system memory, potentially destabilizing other routing protocols.

Technologies: Cisco IOS XR. Vendors: Cisco.

Quick answers

Is CVE-2020-3569 exploited in the wild?
Yes. CVE-2020-3569 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-3569?
Critical severity, with a CVSS score of 8.6, published 3 November 2021.
Which products and versions are affected?
Cisco IOS XR Software 6.1.4, 6.2.3, 6.3.3, 6.4.2, 6.5.3, 6.6.2, 6.6.3, 7.0.2, 7.1.2, 7.1.15.
Is there a fix for CVE-2020-3569?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2020-3569 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2020-3569?
Check whether you run Cisco IOS XR. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Cisco IOS XR Software 6.1.4, 6.2.3, 6.3.3, 6.4.2, 6.5.3, 6.6.2, 6.6.3, 7.0.2, 7.1.2, 7.1.15

Timeline

  • 2021-11-03: disclosed
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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