CVE-2021-34734 Use after free in Cisco Video Surveillance 7000 Series IP Cameras
An unauthenticated adjacent attacker can cause a denial of service on Cisco Video Surveillance IP cameras by sending crafted LLDP packets.
- 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-2021-34734?
CVE-2021-34734 is a medium-severity use after free vulnerability in Cisco Video Surveillance 7000 Series IP Cameras, published on 18 Aug 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 Link Layer Discovery Protocol (LLDP) implementation for the Cisco Video Surveillance 7000 Series IP Cameras firmware could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper management of memory resources, referred to as a double free. An attacker could exploit this vulnerability by sending crafted LLDP packets to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
Weakness: CWE-415
Which versions are affected by CVE-2021-34734?
It affects 1 product.
Products include Cisco Video Surveillance 7000 Ip Camera Firmware.
How do I fix CVE-2021-34734?
No fix has been published for CVE-2021-34734 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-34734 being exploited?
There is no known exploitation of CVE-2021-34734 in the wild and no public exploit code.
Sources
Also known as GHSA-v9rw-54r8-5m4q.