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i.e. it can be JavaScript or Lua scripting closely tied to Go code, such as a web browser, custom map / mod scripting for a game engine, etc. There are a lot of cases where an attacker has scripting capabilities. Remote access to a service can also provide similar capabilities.
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It's definitely way harder to do an exploit like this without either direct remote connections to a service or even better local scripting. Still, I'm not really surprised anymore when people exploit something like a 1 byte null overflow without scripting or an active connection.
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