Schneider Electric Modicon Multiple Controllers HTTP Response Splitting

high Nessus Network Monitor Plugin ID 720248
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Synopsis

Schneider Electric's Modicon Premium, Modicon Quantum, Modicon M340, and BMXNOR0200 controllers improperly handle CRLF Sequences in HTTP Headers potentially causing denial-of-service.

Description

Improper Neutralization of CRLF Sequences in HTTP Headers (HTTP Response Splitting) vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 where a denial of service can occur for about 1 minute by sending a specially crafted HTTP request.

Solution

Perform vendor recommended mitigations and apply available vendor upgrades.

See Also

https://www.schneider-electric.com/en/download/document/SEVD-2018-327-01,https://www.tenable.com/security/research/tra-2018-38

Plugin Details

Severity: High

ID: 720248

Family: SCADA

Published: 5/8/2019

Updated: 9/30/2019

Risk Information

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

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

Patch Publication Date: 11/30/2018

Vulnerability Publication Date: 11/30/2018

Reference Information

CVE: CVE-2018-7830