CODESYS V3 Web Server Heap-based Buffer Overflow (CVE-2021-33485)

critical Nessus Plugin ID 155947

Synopsis

The CODESYS V3 web server running on the remote host is affected by a heap-based buffer overflow vulnerability.

Description

The CODESYS V3 web server running on the remote host is affected by a heap-based buffer overflow vulnerability. An unauthenticated, remote attacker can exploit this to execute arbitrary code.

Solution

Apply updates in accordance with the vendor advisory.

Plugin Details

Severity: Critical

ID: 155947

File Name: scada_codesys_2021-09.nbin

Version: 1.31

Type: remote

Family: SCADA

Published: 12/8/2021

Updated: 7/17/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-33485

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:3s-software:codesys_runtime_system

Exploit Ease: No known exploits are available

Patch Publication Date: 5/26/2021

Vulnerability Publication Date: 5/19/2021

Reference Information

CVE: CVE-2021-33485

Detections

Analytics