Wago PFC200 iocheckd service 'I/O-Check' cache Command Injection (CVE-2019-5174)

high Tenable OT Security Plugin ID 500807

Synopsis

The remote OT asset is affected by a vulnerability.

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().

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Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 500807

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 2/14/2023

Updated: 9/4/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2019-5174

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:wago:pfc200_firmware:03.02.02%2814%29

Required KB Items: Tenable.ot/Wago

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/11/2020

Vulnerability Publication Date: 3/11/2020

Reference Information

CVE: CVE-2019-5174

CWE: 78

Detections

Analytics