Schneider Electric Modicon Modbus Protocol Authentication Bypass

critical Nessus Network Monitor Plugin ID 720119

Synopsis

An Authentication Bypass by Capture-Replay issue was discovered in Schneider Electric Modicon Modbus Protocol.

Description

An Authentication Bypass by Capture-Replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download.

Solution

Perform vendor recommended mitigations and apply available vendor upgrades.

See Also

https://ics-cert.us-cert.gov/advisories/ICSA-17-101-01,http://www.securityfocus.com/bid/97562

Plugin Details

Severity: Critical

ID: 720119

Family: SCADA

Published: 5/8/2019

Updated: 9/30/2019

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 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

Patch Publication Date: 4/11/2017

Vulnerability Publication Date: 4/11/2017

Reference Information

CVE: CVE-2017-6034

BID: 97562