CVE-2020-12521 Denial of service in AXC F 1152 (1151412)
A specially crafted LLDP packet can cause high system load, leading to service failure or reboot on Phoenix Contact PLCnext Control Devices.
- 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-2020-12521?
CVE-2020-12521 is a medium-severity denial of service vulnerability in Phoenix Contact AXC F 1152 (1151412), published on 17 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
On Phoenix Contact PLCnext Control Devices versions before 2021.0 LTS a specially crafted LLDP packet may lead to a high system load in the PROFINET stack. An attacker can cause failure of system services or a complete reboot.
Weakness: CWE-20
Which versions are affected by CVE-2020-12521?
It affects 1 product.
Products include Phoenixcontact Plcnext Firmware.
How do I fix CVE-2020-12521?
No fix has been published for CVE-2020-12521 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-2020-12521 being exploited?
There is no known exploitation of CVE-2020-12521 in the wild and no public exploit code.
Other vulnerabilities in Phoenix Contact AXC F 1152 (1151412)
Sources
Also known as GHSA-vp46-jgwp-q8w3.