PT-2020-11085 · Wago · Wago Pfc 200

Published 2020-03-10 · Updated 2021-07-21 · CVE-2019-5166

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base 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 version 03.02.02(14)

Description A stack buffer overflow issue exists in the iocheckd service 'I/O-Check' functionality. This can be triggered by a specially crafted XML cache file written to a specific location on the device, causing a stack buffer overflow and resulting in code execution. An attacker can exploit this by sending a specially crafted packet to trigger the parsing of this cache file.

Recommendations For WAGO PFC 200 version 03.02.02(14), consider disabling the iocheckd service until a patch is available to prevent exploitation. Restrict access to the device to minimize the risk of a specially crafted packet being sent to trigger the vulnerability. Avoid using the 'I/O-Check' functionality until the issue is resolved.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2019-5166

Affected Products

Wago Pfc 200

References · 4

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2019-0961 · Exploit
• https://osv.dev/vulnerability/CVE-2019-5166 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-5166 · Security Note
• https://t.me/cvenotify/1538 · Telegram Post