Serious Flaw Found in Many Siemens Industrial Products

Different goods manufactured by Siemens are found defected with a critical vulnerability that can be oppressed by a distant cyberpunk to cause systems to move in a denial-of-service (DoS) situation.

The flaw, tracked as CVE-2017-12741 and rated “high severity,” was reported to Siemens by George Lashenko of industrial cybersecurity firm CyberX.

The list of marked products according to Siemens contains SIMATIC S7-200 Smart micro-PLCs for small automation applications, SIMATIC S7 CPUs, SIMATIC WinAC RTX software controllers, SIMATIC ET 200 PROFINET interface modules, SIMATIC PN/PN couplers, SIMATIC Compact field units, development kits for PROFINET IO, SIMOTION motion control systems, SINAMICS converters, SINUMERIK CNC automation solutions, SIMOCODE motor management systems, and SIRIUS 3RW motor soft starters.

Cyberpunk can cause defected systems to glitch by sending them particularly crafted packets through UDP port 161, which is utilized for the Simple Network Management Protocol – SNMP. So as to improve from the denial-of-service (DoS) form, the devices should be restarted through manual functioning. The justifying causes sector of Siemens’ advisory lists the necessity that the cyberpunk must have network grant for manipulation, and the actual that it instructs organizations to function these devices merely in expected environments.

Though, CyberX stated SecurityWeek that there are approximately 2,000 Siemens devices attainable from the Internet, containing about 400 that have an exposed SNMP port, which could create them vulnerable to the enterprise’s exploit.

“DoS vulnerabilities shouldn’t be taken lightly,” CyberX said. “The December 2016 attack on the Ukrainian electrical grid used this type of exploit to disable protection relays and make it more difficult for operators to recover.”

The security organization stated that Siemens was very receptive to its vulnerability report. The dealer has issued firmware updates that fix the error in few SIMATIC S7, EK-ERTEC, SIMOTION and SINAMICS goods. Siemens mentions deactivating SNMP, which fully mitigates the vulnerability until patches get available for the former marked goods, defending network attain to port 161, smearing protect-in-depth and cell defense perceptions, and utilizing VPNs.

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