CVE-2021-1521 Cisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Denial of Service Vulnerability
An adjacent attacker can cause a Cisco Video Surveillance IP camera to reload unexpectedly by sending a malicious Cisco Discovery Protocol packet.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1521?
CVE-2021-1521 is a medium-severity denial of service vulnerability in Cisco Video Surveillance 8000 Series IP Cameras, published on 6 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the Cisco Discovery Protocol implementation for Cisco Video Surveillance 8000 Series IP Cameras could allow an unauthenticated, adjacent attacker to cause an affected IP camera to reload. This vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected IP camera. A successful exploit could allow the attacker to cause the affected IP camera to reload unexpectedly, resulting in a denial of service (DoS) condition. Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
Weakness: CWE-119
Which versions are affected by CVE-2021-1521?
It affects 8 products.
Products include Cisco Video Surveillance 8000p Firmware, Cisco Video Surveillance 8020 Firmware, Cisco Video Surveillance 8030 Firmware, Cisco Video Surveillance 8070 Firmware, Cisco Video Surveillance 8400 Firmware, Cisco Video Surveillance 8620 Firmware and 2 more.
How do I fix CVE-2021-1521?
No fix has been published for CVE-2021-1521 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-1521 being exploited?
There is no known exploitation of CVE-2021-1521 in the wild and no public exploit code.
Sources
Also known as GHSA-mx9q-wvq5-gpj8.