CVE-2019-5167 Command injection in WAGO PFC200 Firmware
Attackers can execute arbitrary commands on WAGO PFC200 devices by injecting malicious DNS entries into an XML configuration file.
- 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-2019-5167?
CVE-2019-5167 is a high-severity command injection vulnerability in WAGO PFC200 Firmware, published on 10 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 version 03.02.02(14). At 0x1e3f0 the extracted dns value from the xml file is used as an argument to /etc/config-tools/edit_dns_server %s dns-server-nr=%d dns-server-name=<contents of dns 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 dns entries will be parsed from the xml file.
Weakness: CWE-78
Which versions are affected by CVE-2019-5167?
It affects 1 product.
Products include Wago Pfc200 Firmware.
How do I fix CVE-2019-5167?
No fix has been published for CVE-2019-5167 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-2019-5167 being exploited?
There is no known exploitation of CVE-2019-5167 in the wild and no public exploit code.
Other vulnerabilities in WAGO PFC200 Firmware
Sources
Also known as GHSA-9mfc-vm32-v9f4.