Security News > 2017 > August > Unfixable Automobile Computer Security Vulnerability (Schneier on Security)

There is an unpatchable vulnerability that affects most modern cars. It's buried in the Controller Area Network (CAN): Researchers say this flaw is not a vulnerability in the classic meaning of the word. This is because the flaw is more of a CAN standard design choice that makes it unpatchable. Patching the issue means changing how the CAN standard works...

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https://www.schneier.com/blog/archives/2017/08/unfixable_autom.html