CVE-2019-5172 Command injection in WAGO PFC200
An attacker can execute arbitrary commands on WAGO PFC200 devices by sending a crafted packet to the iocheckd service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-5172?
CVE-2019-5172 is a high-severity command injection vulnerability in WAGO PFC200, published on 11 Mar 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An exploitable command injection vulnerability exists in the iocheckd service ‘I/O-Check’ function of the WAGO PFC 200 Firmware version 03.02.02(14). An attacker can send a specially crafted packet to trigger the parsing of this cache file. At 0x1e840 the extracted ntp value from the xml file is used as an argument to /etc/config-tools/config_sntp time-server-%d=<contents of ntp node> using sprintf(). This command is later executed via a call to system(). This is done in a loop and there is no limit to how many ntp entries will be parsed from the xml file.
Weakness: CWE-78
Which versions are affected by CVE-2019-5172?
It affects 1 product.
Products include Wago Pfc200 Firmware.
How do I fix CVE-2019-5172?
No fix has been published for CVE-2019-5172 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2019-5172 being exploited?
There is no known exploitation of CVE-2019-5172 in the wild and no public exploit code.
Other vulnerabilities in WAGO PFC200
Sources
Also known as GHSA-wxw5-4mj8-2m98.