Siemens SIMATIC S7-PLCSIM deserialization

Summaryinfo

A vulnerability described as critical has been identified in Siemens SIMATIC S7-PLCSIM, SIMATIC STEP 7 Safety, SIMATIC STEP 7 Safety, SIMATIC STEP 7, SIMATIC WinCC Unified, SIMATIC WinCC, SIMOCODE ES, SIMOTION SCOUT TIA, SINAMICS Startdrive, SIRIUS Safety ES, SIRIUS Soft Starter ES and TIA Portal Cloud. Affected by this issue is some unknown functionality. Such manipulation leads to deserialization. This vulnerability is listed as CVE-2023-32736. The attack must be carried out locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Siemens SIMATIC S7-PLCSIM, SIMATIC STEP 7 Safety, SIMATIC STEP 7 Safety, SIMATIC STEP 7, SIMATIC WinCC Unified, SIMATIC WinCC, SIMOCODE ES, SIMOTION SCOUT TIA, SINAMICS Startdrive, SIRIUS Safety ES, SIRIUS Soft Starter ES and TIA Portal Cloud. Affected by this issue is an unknown code block. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is 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 8), SIMATIC STEP 7 Safety V18 (All versions < V18 Update 5), SIMATIC STEP 7 V16 (All versions), SIMATIC STEP 7 V17 (All versions < V17 Update 8), SIMATIC STEP 7 V18 (All versions < V18 Update 5), SIMATIC WinCC Unified V16 (All versions), SIMATIC WinCC Unified V17 (All versions < V17 Update 8), SIMATIC WinCC Unified V18 (All versions < V18 Update 5), SIMATIC WinCC V16 (All versions), SIMATIC WinCC V17 (All versions < V17 Update 8), SIMATIC WinCC V18 (All versions < V18 Update 5), SIMOCODE ES V16 (All versions), SIMOCODE ES V17 (All versions < V17 Update 8), SIMOCODE ES V18 (All versions), SIMOTION SCOUT TIA V5.4 SP1 (All versions), SIMOTION SCOUT TIA V5.4 SP3 (All versions), SIMOTION SCOUT TIA V5.5 SP1 (All versions), SINAMICS Startdrive V16 (All versions), SINAMICS Startdrive V17 (All versions), SINAMICS Startdrive V18 (All versions), SIRIUS Safety ES V17 (All versions < V17 Update 8), SIRIUS Safety ES V18 (All versions), SIRIUS Soft Starter ES V17 (All versions < V17 Update 8), SIRIUS Soft Starter ES V18 (All versions), TIA Portal Cloud V16 (All versions), TIA Portal Cloud V17 (All versions < V4.6.0.1), TIA Portal Cloud V18 (All versions < V4.6.1.0). Affected products do not properly sanitize user-controllable input when parsing user settings. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application.

The advisory is shared for download at cert-portal.siemens.com. This vulnerability is handled as CVE-2023-32736 since 05/12/2023. The exploitation is known to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/12/2024).

Upgrading eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• SCADA Software

Vendor

• Siemens

Name

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

License

• commercial

Website

• Vendor: https://www.siemens.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion