Siemens and Schneider Electric on Tuesday published a total of 25 advisories to address more than 40 vulnerabilities affecting their industrial control system (ICS) products.
Siemens
Siemens has released 21 new advisories and updated 25 previously published advisories. The new advisories cover 36 vulnerabilities, including five that have been assigned a critical severity rating.
One of the critical flaws, with a CVSS score of 10, impacts the Desigo CC building management platform and the Cerberus danger management station (DMS). The flaw, a deserialization issue, can allow an unauthenticated attacker to execute arbitrary code on the affected system. Siemens pointed out that the risk of exploitation is higher for systems connected directly to the internet.
Another critical vulnerability with a CVSS score of 10 is a command injection issue affecting the Siveillance Open Interface Services (OIS) application used by Siemens building management systems. It can be exploited by a remote, unauthenticated attacker for code execution with root privileges.
A critical severity rating has also been assigned to a buffer overflow in the web server of APOGEE and TALON automation devices. A remote attacker can exploit the security hole for arbitrary code execution with root privileges.
An update for Siemens’ Industrial Edge app and device management product fixes a critical issue that can allow an unauthenticated attacker to change the password of any user on the system, enabling them to impersonate that user.
The last critical flaw impacts SIPROTEC 5 relays and it can allow a remote attacker to cause a denial of service (DoS) condition or execute arbitrary code.
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High-severity flaws have been addressed in Ruggedcom ROX devices (take control of device), Simcenter STAR-CCM+ Viewer (code execution or data extraction), Siemens NX (access violation and potentially code execution), SINEC NMS (download files from the filesystem and manipulate configuration), SCALANCE switches (DoS), Teamcenter (account takeover and unauthorized data access), SIMATIC NET CP modules (DoS), LOGO! CMR and SIMATIC RTU 3000 (DoS), SIPROTEC 5 (DoS), RFID terminals (code execution), and SINEMA Remote Connect Server (DoS).
Medium-severity vulnerabilities that can lead to information disclosure, connection hijacking, and path traversal have been addressed in SIMATIC, LOGO! CMR and SIMATIC RTU 3000, Teamcenter Active Workspace, SINEMA Server, and Simcenter Femap products.
Siemens has released patches and/or mitigations for the vulnerabilities disclosed on Tuesday.
Schneider Electric
Schneider Electric released four advisories covering a total of seven vulnerabilities. Two of the flaws impact the StruxureWare Data Center Expert product, which is designed for managing physical infrastructure.
The vulnerabilities, both rated critical, could allow an attacker to remotely execute arbitrary code, which the industrial giant says could result in downtime or an outage.
EcoStruxure Control Expert, EcoStruxure Process Expert, and SCADAPack RemoteConnect products are affected by a high-severity vulnerability that could allow arbitrary code execution. However, the attacker would need to trick the victim into opening a malicious project file.
Three high-severity flaws have been patched in the web server component of the Modicon M340 PLC. They can be exploited to obtain sensitive information, or cause a DoS condition.
Related: August 2021 ICS Patch Tuesday: Siemens, Schneider Address Over 50 Flaws
Related: ICS Patch Tuesday: Siemens and Schneider Electric Address 100 Vulnerabilities
Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.
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