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Schneider Electric Modicon Exposure of Sensitive Information to an Unauthorized Actor (CVE-2021-22786)

high Tenable OT Security Plugin ID 500793

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol. Affected Products: Modicon M340 CPU (part numbers BMXP34*) (Versions prior to V3.30), Modicon M580 CPU (part numbers BMEP* and BMEH*) (Versions prior to SV3.20), Modicon MC80 (BMKC80) (Versions prior to V1.6), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) (All Versions), Modicon Momentum MDI (171CBU*) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions)

 - A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol.
 Affected Products: Modicon M340 CPU (part numbers BMXP34*) (Versions prior to V3.30), Modicon M580 CPU (part numbers BMEP* and BMEH*) (Versions prior to SV3.20), Modicon MC80 (BMKC80) (Versions prior to V1.6), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) (All Versions), Modicon Momentum MDI (171CBU*) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions) (CVE-2021-22786)

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.

See Also

http://www.nessus.org/u?76c4704b

Plugin Details

Severity: High

ID: 500793

Version: 1.4

Type: remote

Family: Tenable.ot

Published: 2/8/2023

Updated: 1/10/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2021-22786

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:H/I:N/A:N

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

Vulnerability Information

CPE: cpe:/o:schneider-electric:modicon_m340_bmxp341000_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342000_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp3420102_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342010_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342020_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342020h_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp3420302_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp3420302h_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342030_firmware, cpe:/o:schneider-electric:modicon_m340_bmxp342030h_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh582040_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh582040c_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh582040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh584040_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh584040c_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh584040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh586040_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh586040c_firmware, cpe:/o:schneider-electric:modicon_m580_bmeh586040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmep581020_firmware, cpe:/o:schneider-electric:modicon_m580_bmep581020h_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582020_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582020h_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582040h_firmware, cpe:/o:schneider-electric:modicon_m580_bmep582040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmep583020_firmware, cpe:/o:schneider-electric:modicon_m580_bmep583040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep584020_firmware, cpe:/o:schneider-electric:modicon_m580_bmep584040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep584040s_firmware, cpe:/o:schneider-electric:modicon_m580_bmep585040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep585040c_firmware, cpe:/o:schneider-electric:modicon_m580_bmep586040_firmware, cpe:/o:schneider-electric:modicon_m580_bmep586040c_firmware, cpe:/o:schneider-electric:modicon_mc80_bmkc8020301_firmware, cpe:/o:schneider-electric:modicon_mc80_bmkc8020310_firmware, cpe:/o:schneider-electric:modicon_mc80_bmkc8030311_firmware, cpe:/o:schneider-electric:modicon_momentum_171cbu78090_firmware, cpe:/o:schneider-electric:modicon_momentum_171cbu98090_firmware, cpe:/o:schneider-electric:modicon_momentum_171cbu98091_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 2/1/2023

Vulnerability Publication Date: 2/1/2023

Reference Information

CVE: CVE-2021-22786

CWE: 200