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Since heap spraying takes advantage of javascript's predictability in allocating heap chunks, does this mean that heap spraying only works for browser applications and not other usual applications?

  • Any language, protocol, etc that accept data, which contains the vulnerabilities, will subject to this exploit. – mootmoot Sep 25 '17 at 16:05
  • JIT spraying (a type of heap spraying) is more common in the context of browsers, though even it isn't unique to them. – forest Dec 7 '17 at 4:40
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No, heap spray can be used for any exploit that needs heap data to be aligned a certain way. Example include the ExternalBlue exploit that targets SMB. It heaps sprays a bunch of SMB objects to align the memory, so that the right objects get corrupted.

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