CVE-2019-5174 Command injection in WAGO PFC200 Firmware
Attackers can execute arbitrary OS commands on WAGO PFC200 devices by sending crafted packets that trigger parsing of a malicious XML cache 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-2019-5174?
CVE-2019-5174 is a high-severity command injection vulnerability in WAGO PFC200 Firmware, 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 version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can be used to inject OS commands. An attacker can send a specially crafted packet to trigger the parsing of this cache file.At 0x1e9fc the extracted subnetmask value from the xml file is used as an argument to /etc/config-tools/config_interfaces interface=X1 state=enabled subnet-mask=<contents of subnetmask node> using sprintf(). This command is later executed via a call to system().
Weakness: CWE-78
Which versions are affected by CVE-2019-5174?
It affects 1 product.
Products include Wago Pfc200 Firmware.
How do I fix CVE-2019-5174?
No fix has been published for CVE-2019-5174 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-2019-5174 being exploited?
There is no known exploitation of CVE-2019-5174 in the wild and no public exploit code.
Other vulnerabilities in WAGO PFC200 Firmware
Sources
Also known as GHSA-62g4-v938-xwvh.