#VU46200 Resource exhaustion

Published: 2020-09-02

Vulnerability identifier: #VU46200

Vulnerability risk: High

CVSSv3: 8.6 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:H/RL:U/RC:C]

CVE-ID: CVE-2020-3569


Exploitation vector: Network

Exploit availability: No

Vulnerable software: Cisco IOS XR
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient queue management for Internet Group Management Protocol (IGMP) packets in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software. A remote attacker can trigger resource exhaustion by sending crafted IGMP  traffic to the affected device and perform a denial of service (DoS) attack.

Note: this vulnerability is being actively exploited in the wild.

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Cisco IOS XR: 6.6.3


External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

Latest bulletins with this vulnerability