CVE-2019-5170 Command injection in WAGO PFC200
Attackers can execute arbitrary OS commands on WAGO PFC200 devices by sending a crafted packet that triggers 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-2019-5170?
CVE-2019-5170 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). 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 0x1e87c the extracted hostname value from the xml file is used as an argument to /etc/config-tools/change_hostname hostname=<contents of hostname node> using sprintf(). This command is later executed via a call to system().
Weakness: CWE-78
Which versions are affected by CVE-2019-5170?
It affects 1 product.
Products include Wago Pfc200 Firmware.
How do I fix CVE-2019-5170?
No fix has been published for CVE-2019-5170 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-2019-5170 being exploited?
There is no known exploitation of CVE-2019-5170 in the wild and no public exploit code.
Other vulnerabilities in WAGO PFC200
Sources
Also known as GHSA-59q2-93ch-m6p9.