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This weekend I have played Google CTF with r3kapig. On the first day I tried the OCR challenge but failed to solve it, and on the second day I spent the whole day working on the d8 that I am more familiar with. Finally I managed to solve it at midnight as the second blood. This challenge is quite interesting so it is worth to do a write-up. 0x00 Overview In this challenge, we need to exploit a runner.cc that takes binary input and passes it to v8::ScriptCompiler::CachedData, which is to be execu...