Siemens SIMATIC S7-200 SMART CPU ST60 IP ID Sequence Number random values

Summaryinfo

A vulnerability was found in Siemens SIMATIC S7-200 SMART CPU CR40, SIMATIC S7-200 SMART CPU CR60, SIMATIC S7-200 SMART CPU SR20, SIMATIC S7-200 SMART CPU SR30, SIMATIC S7-200 SMART CPU SR40, SIMATIC S7-200 SMART CPU SR60, SIMATIC S7-200 SMART CPU ST20, SIMATIC S7-200 SMART CPU ST30, SIMATIC S7-200 SMART CPU ST40 and SIMATIC S7-200 SMART CPU ST60. It has been classified as problematic. The impacted element is an unknown function of the component IP ID Sequence Number Handler. The manipulation leads to random values. This vulnerability is listed as CVE-2024-35292. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Siemens SIMATIC S7-200 SMART CPU CR40, SIMATIC S7-200 SMART CPU CR60, SIMATIC S7-200 SMART CPU SR20, SIMATIC S7-200 SMART CPU SR30, SIMATIC S7-200 SMART CPU SR40, SIMATIC S7-200 SMART CPU SR60, SIMATIC S7-200 SMART CPU ST20, SIMATIC S7-200 SMART CPU ST30, SIMATIC S7-200 SMART CPU ST40 and SIMATIC S7-200 SMART CPU ST60. This issue affects an unknown code block of the component IP ID Sequence Number Handler. The manipulation with an unknown input leads to a random values vulnerability. Using CWE to declare the problem leads to CWE-330. The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in SIMATIC S7-200 SMART CPU CR40 (6ES7288-1CR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU CR60 (6ES7288-1CR60-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA1) (All versions). Affected devices are using a predictable IP ID sequence number. This leaves the system susceptible to a family of attacks which rely on the use of predictable IP ID sequence numbers as their base method of attack and eventually could allow an attacker to create a denial of service condition.

It is possible to read the advisory at cert-portal.siemens.com. The identification of this vulnerability is CVE-2024-35292 since 05/15/2024. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/11/2024). The attack technique deployed by this issue is T1600.001 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• SCADA Software

Vendor

• Siemens

Name

• SIMATIC S7-200 SMART CPU CR40
• SIMATIC S7-200 SMART CPU CR60
• SIMATIC S7-200 SMART CPU SR20
• SIMATIC S7-200 SMART CPU SR30
• SIMATIC S7-200 SMART CPU SR40
• SIMATIC S7-200 SMART CPU SR60
• SIMATIC S7-200 SMART CPU ST20
• SIMATIC S7-200 SMART CPU ST30
• SIMATIC S7-200 SMART CPU ST40
• SIMATIC S7-200 SMART CPU ST60

License

• commercial

Website

• Vendor: https://www.siemens.com/

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