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CVE-2008-2361 - RENDER Extension crash

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An integer overflow may occur in the computation of the size of the
glyph to be allocated by the ProcRenderCreateCursor() function which
will cause less memory to be allocated than expected, leading later to
dereferencing un-mapped memory, causing a crash of the X server.
This commit is contained in:
Matthieu Herrb 2008-06-10 12:22:30 -06:00 • committed by Matthieu Herrb
parent f7c40a003d
commit 5677751a04
1 changed files with 2 additions and 0 deletions
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2
render/render.c
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@ -1569,6 +1569,8 @@ ProcRenderCreateCursor (ClientPtr client)
pScreen = pSrc->pDrawable->pScreen;
width = pSrc->pDrawable->width;
height = pSrc->pDrawable->height;
if (height && width > UINT32_MAX/(height*sizeof(CARD32)))
return BadAlloc;
if ( stuff->x > width
|| stuff->y > height )
return (BadMatch);