A Siemens S7 1500 Logic Controller Flaw Raises The Specter Of Stuxnet
The vulnerability was discovered by researchers at the embedded device security firm Red Balloon Security after they spent more than a year developing a methodology to evaluate the S7-1500’s firmware, which Siemens has encrypted for added protection since 2013. Firmware is the low-level code that coordinates hardware and software on a computer. The vulnerability stems from a basic error in how the cryptography is implemented, but Siemens can’t fix it through a software patch because the scheme is physically burned onto a dedicated ATECC CryptoAuthentication chip....