Siemens SIMATIC S7-PLCSIM deserialization

Summaryinfo

A vulnerability was found in Siemens SIMATIC S7-PLCSIM, SIMATIC STEP 7 Safety, SIMATIC STEP 7, SIMATIC WinCC Unified, SIMATIC WinCC, SIMOCODE ES, SIMOTION SCOUT TIA, SINAMICS Startdrive, SIRIUS Safety ES and TIA Portal Cloud. It has been declared as very critical. This impacts an unknown function. The manipulation results in deserialization. This vulnerability was named CVE-2024-49849. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Siemens SIMATIC S7-PLCSIM, SIMATIC STEP 7 Safety, SIMATIC STEP 7, SIMATIC WinCC Unified, SIMATIC WinCC, SIMOCODE ES, SIMOTION SCOUT TIA, SINAMICS Startdrive, SIRIUS Safety ES and TIA Portal Cloud. It has been classified as very critical. Affected is some unknown processing. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in SIMATIC S7-PLCSIM V16 (All versions), SIMATIC S7-PLCSIM V17 (All versions), SIMATIC STEP 7 Safety V16 (All versions), SIMATIC STEP 7 Safety V17 (All versions < V17 Update 9), SIMATIC STEP 7 Safety V18 (All versions), SIMATIC STEP 7 Safety V19 (All versions < V19 Update 4), SIMATIC STEP 7 V16 (All versions), SIMATIC STEP 7 V17 (All versions < V17 Update 9), SIMATIC STEP 7 V18 (All versions), SIMATIC STEP 7 V19 (All versions < V19 Update 4), SIMATIC WinCC Unified V16 (All versions), SIMATIC WinCC Unified V17 (All versions < V17 Update 9), SIMATIC WinCC Unified V18 (All versions), SIMATIC WinCC Unified V19 (All versions < V19 Update 4), SIMATIC WinCC V16 (All versions), SIMATIC WinCC V17 (All versions < V17 Update 9), SIMATIC WinCC V18 (All versions), SIMATIC WinCC V19 (All versions < V19 Update 4), SIMOCODE ES V16 (All versions), SIMOCODE ES V17 (All versions), SIMOCODE ES V18 (All versions), SIMOCODE ES V19 (All versions), SIMOTION SCOUT TIA V5.4 (All versions), SIMOTION SCOUT TIA V5.5 (All versions), SIMOTION SCOUT TIA V5.6 (All versions < V5.6 SP1 HF7), SINAMICS Startdrive V16 (All versions), SINAMICS Startdrive V17 (All versions), SINAMICS Startdrive V18 (All versions), SINAMICS Startdrive V19 (All versions), SIRIUS Safety ES V17 (TIA Portal) (All versions), SIRIUS Safety ES V18 (TIA Portal) (All versions), SIRIUS Safety ES V19 (TIA Portal) (All versions), SIRIUS Soft Starter ES V17 (TIA Portal) (All versions), SIRIUS Soft Starter ES V18 (TIA Portal) (All versions), SIRIUS Soft Starter ES V19 (TIA Portal) (All versions), TIA Portal Cloud V16 (All versions), TIA Portal Cloud V17 (All versions), TIA Portal Cloud V18 (All versions), TIA Portal Cloud V19 (All versions < V5.2.1.1). Affected products do not properly sanitize user-controllable input when parsing log files. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application.

The advisory is available at cert-portal.siemens.com. This vulnerability is traded as CVE-2024-49849 since 10/21/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 12/09/2025).

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• SCADA Software

Vendor

• Siemens

Name

• SIMATIC S7-PLCSIM
• SIMATIC STEP 7
• SIMATIC STEP 7 Safety
• SIMATIC WinCC
• SIMATIC WinCC Unified
• SIMOCODE ES
• SIMOTION SCOUT TIA
• SINAMICS Startdrive
• SIRIUS Safety ES
• TIA Portal Cloud

License

• commercial

Website

• Vendor: https://www.siemens.com/

CPE 2.3info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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