COPYING.txt
author Sam Lantinga <slouken@libsdl.org>
Mon, 18 Feb 2019 07:50:33 -0800
changeset 12612 07c39cbbeacf
parent 12503 806492103856
permissions -rw-r--r--
Fixed bug 4500 - Heap-Buffer Overflow in Map1toN pertaining to SDL_pixels.c

Petr Pisar

The reproducer has these data in BITMAPINFOHEADER:

biSize = 40
biBitCount = 8
biClrUsed = 131075

SDL_LoadBMP_RW() function passes biBitCount as a color depth to SDL_CreateRGBSurface(), thus 256-color pallete is allocated. But then biClrUsed colors are read from a file and stored into the palette. SDL_LoadBMP_RW should report an error if biClrUsed is greater than 2^biBitCount.
     1 
     2 Simple DirectMedia Layer
     3 Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
     4   
     5 This software is provided 'as-is', without any express or implied
     6 warranty.  In no event will the authors be held liable for any damages
     7 arising from the use of this software.
     8 
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    10 including commercial applications, and to alter it and redistribute it
    11 freely, subject to the following restrictions:
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    20