PT-2020-11092 · Wago · Wago Pfc 200
Published
2020-03-11
·
Updated
2020-03-17
·
CVE-2019-5173
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
WAGO PFC 200 Firmware version 03.02.02(14)
Description
A command injection issue exists in the iocheckd service 'I/O-Check' function. This is due to the improper handling of a specially crafted XML cache file, which can be used to inject OS commands. An attacker can trigger the parsing of this cache file by sending a specially crafted packet. The extracted state value from the XML file is used as an argument to the
/etc/config-tools/config interfaces interface, specifically interface=X1 state=<contents of state node>, using sprintf(). This command is later executed via a call to system().Recommendations
For WAGO PFC 200 Firmware version 03.02.02(14), consider disabling the 'I/O-Check' function in the iocheckd service until a patch is available. Restrict access to the
/etc/config-tools/config interfaces interface to minimize the risk of exploitation. Avoid using the state node in the XML cache file until the issue is resolved.Exploit
Fix
OS Command Injection
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Wago Pfc 200