CVE-2017-6026

Schneider Electric PLC - Session Calculation Authentication Bypass

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The session numbers generated by the web application are lacking randomization and are shared between several users. This may allow a current session to be compromised.

Un problema de uso de valores aleatorios insuficientes fue encontrado en Schneider Electric Modicon PLCs Modicon M241, versiones de firmware anteriores a 4.0.5.11, y Modicon M251, versiones de firmware anteriores a 4.0.5.11. Los números de sesión generados por la aplicación web carecen de aleatorización y son compartidos entre varios usuarios. Esto puede permitir que una sesión actual se vea comprometida.

Schneider Electric PLC suffers from a session calculation authentication bypass vulnerability.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-02-16 CVE Reserved
2017-06-30 CVE Published
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-330: Use of Insufficiently Random Values

CAPEC

References (3)

URL	Tag	Source
http://www.securityfocus.com/bid/97254	Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/45918	2024-08-05

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Schneider-electric Search vendor "Schneider-electric"	Modicon M251 Firmware Search vendor "Schneider-electric" for product "Modicon M251 Firmware"	<= 4.0.3.20 Search vendor "Schneider-electric" for product "Modicon M251 Firmware" and version " <= 4.0.3.20"	-	Affected	in	Schneider-electric Search vendor "Schneider-electric"	Modicon M251 Search vendor "Schneider-electric" for product "Modicon M251"	-	-	Safe
Schneider-electric Search vendor "Schneider-electric"	Modicon M241 Firmware Search vendor "Schneider-electric" for product "Modicon M241 Firmware"	<= 4.0.3.20 Search vendor "Schneider-electric" for product "Modicon M241 Firmware" and version " <= 4.0.3.20"	-	Affected	in	Schneider-electric Search vendor "Schneider-electric"	Modicon M241 Search vendor "Schneider-electric" for product "Modicon M241"	-	-	Safe