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Markus Lehr
2024-07-11 14:16:35 +02:00
parent 38bc4f53ac
commit 09b621d929
7118 changed files with 525762 additions and 3 deletions
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meta-openembedded/meta-oe/recipes-graphics/libsdl/libsdl-1.2.15/CVE-2019-7635.patch Normal file
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@@ -0,0 +1,63 @@
# HG changeset patch
# User Petr Písař <ppisar@redhat.com>
# Date 1560259692 25200
# Tue Jun 11 06:28:12 2019 -0700
# Branch SDL-1.2
# Node ID f1f5878be5dbf63c1161a8ee52b8a86ece30e552
# Parent a936f9bd3e381d67d8ddee8b9243f85799ea4798
CVE-2019-7635: Reject BMP images with pixel colors out the palette
If a 1-, 4-, or 8-bit per pixel BMP image declares less used colors
than the palette offers an SDL_Surface with a palette of the indicated
number of used colors is created. If some of the image's pixel
refer to a color number higher then the maximal used colors, a subsequent
bliting operation on the surface will look up a color past a blit map
(that is based on the palette) memory. I.e. passing such SDL_Surface
to e.g. an SDL_DisplayFormat() function will result in a buffer overread in
a blit function.
This patch fixes it by validing each pixel's color to be less than the
maximal color number in the palette. A validation failure raises an
error from a SDL_LoadBMP_RW() function.
CVE-2019-7635
https://bugzilla.libsdl.org/show_bug.cgi?id=4498
Signed-off-by: Petr Písař <ppisar@redhat.com>
CVE: CVE-2019-7635
Upstream-Status: Backport
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
diff -r a936f9bd3e38 -r f1f5878be5db src/video/SDL_bmp.c
--- a/src/video/SDL_bmp.c Mon Jun 10 09:25:05 2019 -0700
+++ b/src/video/SDL_bmp.c Tue Jun 11 06:28:12 2019 -0700
@@ -308,6 +308,12 @@
}
*(bits+i) = (pixel>>shift);
pixel <<= ExpandBMP;
+ if ( bits[i] >= biClrUsed ) {
+ SDL_SetError(
+ "A BMP image contains a pixel with a color out of the palette");
+ was_error = SDL_TRUE;
+ goto done;
+ }
} }
break;
@@ -318,6 +324,16 @@
was_error = SDL_TRUE;
goto done;
}
+ if ( 8 == biBitCount && palette && biClrUsed < (1 << biBitCount ) ) {
+ for ( i=0; i<surface->w; ++i ) {
+ if ( bits[i] >= biClrUsed ) {
+ SDL_SetError(
+ "A BMP image contains a pixel with a color out of the palette");
+ was_error = SDL_TRUE;
+ goto done;
+ }
+ }
+ }
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
/* Byte-swap the pixels if needed. Note that the 24bpp
case has already been taken care of above. */