A Russian security researcher has unleashed a brute-force password-cracking tool that can capture passwords for Siemens S7 programmable logic controllers (PLC), which run machinery in power plants and manufacturing sites. Sergey Gordeychik, a researcher with Positive Technologies, last week at the S4 2013 conference in Miami released the proof-of-concept tool that brute-force hacks the challenge-response information from a TCP/IP traffic exchange. The tool demonstrates how an attacker on an adjacent network could grab credentials for the PLCs simply by brute-force hacking for passwords.
S7 is the protocol used for communicating among engineering systems, SCADA, HMI, and PLC equipment, and can be password-protected. 'We wrote two brute-force authentications for S7,' Gordeychik says. Siemens was the target of much of the vulnerability research at last week's conference, where another researcher also demonstrated how to intercept S7-400 PLC passwords.
Feb 17, 2018 Sometimes the password is misplaced or forgotten. This program will retrieve a lost password. Just install the Keyread program and connect to the PLC with the Red SC-09 cable. Select the correct com port and connect. The key word will be displayed. Copy the key word and unlock the program with GX-Developer.
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Erik Johansson, an independent consultant and researcher at the Royal Institute of Technology in Sweden, demonstrated how unpatched S7 systems are. Siemens described the flaw as a security 'weakness in the programming and configuration client software authentication method' that the S7 employs. As one of the most prevalent vendors in the SCADA/ICS world, Siemens has been under the microscope of security researchers ever since it was revealed in 2010 that the Stuxnet attack zeroed in on its process control system products. The vendor, for the most part, has issued patches in response to bugs that are publicly reported, and also has begun updating its product families with more built-in security features as well as better-written code. ICS-CERT issued a security alert about the password-cracker after Gordeychik's presentation last week. 'ICS-CERT has notified the affected vendor of the report and has asked the vendor to confirm the attack vector and identify mitigations.
ICS-CERT is issuing this alert to provide early notice of the report and identify baseline mitigations for reducing risks to these and other cybersecurity attacks,' the alert says. [Researcher Dillon Beresford shows holes in Siemens programmable logic controllers (PLCs) that could lead to attacks. Tobias Limmer of Siemens Product CERT team says the free tool doesn't go after any particular vulnerability in the S7 PLC. 'This is not a vulnerability,' Limmer says. A tool that tries to get the password on' the PLCs, he says.
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'We don't need to release a patch' for this, he says. Protection against password-cracking, he says, requires using strong passwords. 'Eight characters is not enough,' Limmer says. 'The password should be as long as possible. If it's a good password, you should be protected.'
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