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nixpkgs/pkgs/by-name/gi/giflib/CVE-2025-31344.patch
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2025-10-09 14:15:47 +02:00

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Diff

diff -up giflib-5.2.2/gif2rgb.c.omv~ giflib-5.2.2/gif2rgb.c
--- giflib-5.2.2/gif2rgb.c.omv~ 2025-04-07 21:44:54.956355983 +0200
+++ giflib-5.2.2/gif2rgb.c 2025-04-07 21:45:29.630769589 +0200
@@ -329,6 +329,11 @@ static void DumpScreen2RGB(char *FileNam
GifRow = ScreenBuffer[i];
GifQprintf("\b\b\b\b%-4d", ScreenHeight - i);
for (j = 0; j < ScreenWidth; j++) {
+ /* Check if color is within color palete */
+ if (GifRow[j] >= ColorMap->ColorCount) {
+ GIF_EXIT(GifErrorString(
+ D_GIF_ERR_IMAGE_DEFECT));
+ }
ColorMapEntry = &ColorMap->Colors[GifRow[j]];
Buffers[0][j] = ColorMapEntry->Red;
Buffers[1][j] = ColorMapEntry->Green;