CVE-2020-7549 HIGH

Published: 2020-12-11 | Last Modified: 2026-05-28 | Status: Modified

Description

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause denial of HTTP and FTP services when a series of specially crafted requests is sent to the controller over HTTP.

Additional Descriptions (1)

Una CWE-754: Se presenta una vulnerabilidad de Comprobación Inapropiada de Condiciones Inusuales o Excepcionales en el Servidor Web en Modicon M340, Legacy Offers Modicon Quantum y Modicon Premium y Módulos de Comunicación asociados (consulte la notificación de seguridad para las versiones afectadas), que podría causar una denegación de servicios HTTP y FTP cuando una serie de peticiones especialmente diseñadas a través de HTTP son enviadas hacia el controlador

CVSS Metrics

Base Score: 5.3 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector	NETWORK
Attack Complexity	LOW
Privileges Required	NONE
User Interaction	NONE
Scope	UNCHANGED
Confidentiality Impact	NONE
Integrity Impact	NONE
Availability Impact	LOW

Source: [email protected]

Type: Primary

Exploitability Score: 3.9

Impact Score: 1.4

Base Score: 5.0 (MEDIUM)

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector	NETWORK
Access Complexity	LOW
Authentication	NONE
Confidentiality Impact	NONE
Integrity Impact	NONE
Availability Impact	PARTIAL

Source: [email protected]

Type: Primary

Exploitability Score: 10.0

Impact Score: 2.9

Weaknesses

Source	Type	Description
[email protected]	Secondary	en CWE-754

Affected Products

Vendor	Product	Version	Update	Type
schneider-electric	modicon_m340_bmxp341000_firmware	*	<built-in method update of dict object at 0x7e60b9fb7b00>	Operating System
schneider-electric	modicon_m340_bmxp342000_firmware	*	<built-in method update of dict object at 0x7e60b9fb6100>	Operating System
schneider-electric	modicon_m340_bmxp3420102_firmware	*	<built-in method update of dict object at 0x7e60e884d6c0>	Operating System
schneider-electric	modicon_m340_bmxp3420102cl_firmware	*	<built-in method update of dict object at 0x7e6110a9d580>	Operating System
schneider-electric	modicon_m340_bmxp342020_firmware	*	<built-in method update of dict object at 0x7e60b9fb45c0>	Operating System
schneider-electric	modicon_m340_bmxp3420302_firmware	*	<built-in method update of dict object at 0x7e6110a9fb40>	Operating System
schneider-electric	modicon_m340_bmxp3420302cl_firmware	*	<built-in method update of dict object at 0x7e60e884eb80>	Operating System
schneider-electric	bmxnoe0100_firmware	*	<built-in method update of dict object at 0x7e611206dc80>	Operating System
schneider-electric	bmxnoe0110_firmware	*	<built-in method update of dict object at 0x7e60b9fb5800>	Operating System
schneider-electric	bmxnoc0401_firmware	*	<built-in method update of dict object at 0x7e60b9fb5e80>	Operating System
schneider-electric	140noe77111_firmware	*	<built-in method update of dict object at 0x7e611206ddc0>	Operating System
schneider-electric	140noc78100_firmware	*	<built-in method update of dict object at 0x7e6110a9fe40>	Operating System
schneider-electric	140noc78000_firmware	*	<built-in method update of dict object at 0x7e6110a9d440>	Operating System
schneider-electric	140cpu65150_firmware	*	<built-in method update of dict object at 0x7e60b9fb7b40>	Operating System
schneider-electric	tsxety4103_firmware	*	<built-in method update of dict object at 0x7e60b9fb6000>	Operating System
schneider-electric	tsxety5103_firmware	*	<built-in method update of dict object at 0x7e60b9fb7480>	Operating System
schneider-electric	tsxp574634_firmware	*	<built-in method update of dict object at 0x7e60b9fb5a80>	Operating System
schneider-electric	tsxp575634_firmware	*	<built-in method update of dict object at 0x7e613c15a800>	Operating System
schneider-electric	tsxp576634_firmware	*	<built-in method update of dict object at 0x7e60b9fb6fc0>	Operating System

Affected Configurations

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:modicon_m340_bmxp341000_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:modicon_m340_bmxp341000:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:modicon_m340_bmxp342000_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:modicon_m340_bmxp342000:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420102:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420102cl_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420102cl:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:modicon_m340_bmxp342020_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:modicon_m340_bmxp342020:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420302:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:modicon_m340_bmxp3420302cl_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:modicon_m340_bmxp3420302cl:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:bmxnoe0100_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:bmxnoe0100:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:bmxnoe0110_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:bmxnoe0110:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:bmxnoc0401_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:bmxnoc0401:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:140noe77111_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:140noe77111:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:140noc78100_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:140noc78100:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:140noc78000_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:140noc78000:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:140cpu65150_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:140cpu65150:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:tsxety4103_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:tsxety4103:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:tsxety5103_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:tsxety5103:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:tsxp574634_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:tsxp574634:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:tsxp575634_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:tsxp575634:-:::::::*`

Operator: OR

Vulnerable	CPE
Yes	`cpe:2.3:o:schneider-electric:tsxp576634_firmware::::::::`

Operator: OR

Vulnerable	CPE
No	`cpe:2.3:h:schneider-electric:tsxp576634:-:::::::*`

References

https://www.se.com/ww/en/download/document/SEVD-2020-343-06/
Source: [email protected]

Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2020-343-06/
Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory