1. Contents Many Heap Overflow Bugs can be Exploited in a Similar Way PoC of the V8 Heap Overflow Vulnerability – *CTF 2019 oob-v8 Exploitation Idea Actual Exploitation Steps of the V8 Heap Overflow Bug V8 Environment Setup Auxiliary Type Conversion Functions Prepare Objects in Memory Leak Addresses and Fake Objects Arbitrary Reads and Writes RWX Page and Shellcode Injection Summary 2. Many Heap Overflow Bugs can be Exploited in a Similar Way I have introduced a v8 heap overflow bug before:

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