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zgv -- exploitable heap overflows


infamous41md reports:

zgv uses malloc() frequently to allocate memory for storing image data. When calculating how much to allocate, user supplied data from image headers is multiplied and/or added without any checks for arithmetic overflows. We can overflow numerous calculations, and cause small buffers to be allocated. Then we can overflow the buffer, and eventually execute code. There are a total of 11 overflows that are exploitable to execute arbitrary code.

These bugs exist in both zgv and xzgv.



portaudit: zgv -- exploitable heap overflows

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Oliver Eikemeier <>