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Cache poisoning is not necessarily breaking the hash, it just means they snuck something in there somehow (e.g. social engineering techniques).

• Dylan16807 12y ago
  In this context it's cache poisoning that does require breaking the hash. Which is not a realistic reason to reject the concept.
  • duaneb 12y ago
    ...how would social engineering NOT work to distribute javascript vulnerabilities or backdoors via jquery??
    • Dylan16807 12y ago
      Every website using jquery will have the real hash, so you can poison all the mirrors you like and it won't matter. The only way to get the wrong hash onto sites is to actually publish it on the authoritative server. That's not cache poisoning, that's a malicious official version.