3S CODESYS CmpWebServerHandlerV3 Heap-based Buffer Overflow

critical Nessus Plugin ID 131704

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Synopsis

A 3S CODESYS V3 environment on the remote host is affected by a remote code execution vulnerability

Description

A heap-based buffer overflow condition exists in CmpWebServerHandlerV3 due to improper validation of user-supplied data. An unauthenticated, remote attacker can exploit this, via a series of specially crafted messages, to cause a denial of service condition or the execution of arbitrary code.

Note that Nessus has not tested for the issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade 3S CODESYS V3 runtime to version 3.5.15.20 or higher.

Plugin Details

Severity: Critical

ID: 131704

File Name: scada_codesys_2019-10.nbin

Version: 1.92

Type: remote

Family: SCADA

Published: 12/4/2019

Updated: 6/23/2025

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2019-18858

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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:/a:3s-software:codesys_runtime_system

Required KB Items: SCADA/CoDeSys

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/19/2019

Vulnerability Publication Date: 11/19/2019

Reference Information

CVE: CVE-2019-18858

Detections

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