Schneider Electric Modicon Out-of-bounds Write (CVE-2021-22788)

high Tenable OT Security Plugin ID 501194

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-787: Out-of-bounds Write vulnerability exists that could cause denial of service when an attacker sends a specially crafted HTTP request to the web server of the device. Affected Product: Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 501194

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 6/29/2023

Updated: 8/22/2023

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-22788

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:schneider-electric:140cpu65150_firmware, cpe:/o:schneider-electric:140noc77101_firmware, cpe:/o:schneider-electric:140noc78x00_firmware, cpe:/o:schneider-electric:140noe771x1_firmware, cpe:/o:schneider-electric:bmxnoc0401_firmware, cpe:/o:schneider-electric:bmxnoe0100_firmware, cpe:/o:schneider-electric:bmxnoe0110_firmware, cpe:/o:schneider-electric:bmxnor0200h_rtu_firmware, cpe:/o:schneider-electric:bmxp342020_firmware, cpe:/o:schneider-electric:tsxety4103_firmware, cpe:/o:schneider-electric:tsxety5103_firmware, cpe:/o:schneider-electric:tsxp574634_firmware, cpe:/o:schneider-electric:tsxp575634_firmware, cpe:/o:schneider-electric:tsxp576634_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 2/11/2022

Vulnerability Publication Date: 2/11/2022

Reference Information

CVE: CVE-2021-22788

CWE: 787

Detections

Analytics