Schneider Electric Modicon M340 CPU up to 3.64 Modbus channel accessible

Summaryinfo

A vulnerability marked as problematic has been reported in Schneider Electric Modicon M340 CPU up to 3.64. This vulnerability affects unknown code of the component Modbus Handler. The manipulation leads to channel accessible. This vulnerability is traded as CVE-2024-8936. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Schneider Electric Modicon M340 CPU up to 3.64. It has been rated as problematic. This issue affects an unknown code of the component Modbus Handler. The manipulation with an unknown input leads to a channel accessible vulnerability. Using CWE to declare the problem leads to CWE-300. The product does not adequately verify the identity of actors at both ends of a communication channel, or does not adequately ensure the integrity of the channel, in a way that allows the channel to be accessed or influenced by an actor that is not an endpoint. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

CWE-20: Improper Input Validation vulnerability exists that could lead to loss of confidentiality of controller memory after a successful Man-In-The-Middle attack followed by sending a crafted Modbus function call used to tamper with memory.

The advisory is shared at download.schneider-electric.com. The identification of this vulnerability is CVE-2024-8936 since 09/17/2024. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1557 for this issue.

Upgrading to version 3.65 eliminates this vulnerability.

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Productinfo

Type

• SCADA Software

Vendor

• Schneider Electric

Name

• Modicon M340 CPU

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31
• 3.32
• 3.33
• 3.34
• 3.35
• 3.36
• 3.37
• 3.38
• 3.39
• 3.40
• 3.41
• 3.42
• 3.43
• 3.44
• 3.45
• 3.46
• 3.47
• 3.48
• 3.49
• 3.50
• 3.51
• 3.52
• 3.53
• 3.54
• 3.55
• 3.56
• 3.57
• 3.58
• 3.59
• 3.60
• 3.61
• 3.62
• 3.63
• 3.64

License

• commercial

Website

• Vendor: https://www.schneider-electric.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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