giflib: update to 6.1.3.
This commit is contained in:
Duncaen
+37
@@ -0,0 +1,37 @@
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From 212fd4a4ce1f89e8bbb6e6ab5a16053276234131 Mon Sep 17 00:00:00 2001
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From: Anthony Hurtado <amhurtado@protonmail.com>
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Date: Mon, 1 Jun 2026 15:40:48 -0500
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Subject: [PATCH 1/3] Fix CVE-2026-26740: heap OOB write in
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EGifGCBToSavedExtension
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EGifGCBToSavedExtension calls EGifGCBToExtension which unconditionally
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writes 4 bytes into ep->Bytes without checking ep->ByteCount. If the
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extension block was allocated with fewer than 4 bytes, this results in
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a heap buffer overflow.
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The read-side counterpart DGifExtensionToGCB already validates that
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GifExtensionLength == 4 before reading. Add the symmetric check on
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the write side: return GIF_ERROR when ep->ByteCount < 4.
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Signed-off-by: Anthony Hurtado <amhurtado@pm.me>
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---
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egif_lib.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/egif_lib.c b/egif_lib.c
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index f1141a2..d74e8df 100644
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--- a/egif_lib.c
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+++ b/egif_lib.c
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@@ -690,6 +690,9 @@ int EGifGCBToSavedExtension(const GraphicsControlBlock *GCB,
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ExtensionBlock *ep =
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&GifFile->SavedImages[ImageIndex].ExtensionBlocks[i];
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if (ep->Function == GRAPHICS_EXT_FUNC_CODE) {
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+ if (ep->ByteCount < 4) {
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+ return GIF_ERROR;
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+ }
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EGifGCBToExtension(GCB, ep->Bytes);
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return GIF_OK;
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}
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--
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2.55.0
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+233
@@ -0,0 +1,233 @@
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From 9985cfa12c58bd0fd95fd782bd7018499b1e6d7f Mon Sep 17 00:00:00 2001
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From: Anthony Hurtado <amhurtado@protonmail.com>
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Date: Mon, 1 Jun 2026 15:41:11 -0500
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Subject: [PATCH 2/3] Fix integer overflow and type safety issues across giflib
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Multiple integer overflow vulnerabilities exist in giflib's pixel count
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and dimension arithmetic. On 32-bit platforms where long and int are
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32 bits, these overflow to negative values or wrap around, causing
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heap buffer overflows, incorrect loop bounds, and undefined behavior.
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dgif_lib.c:
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- PixelCount: cast to (unsigned long) instead of signed (long) to
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prevent signed overflow UB on 32-bit platforms.
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- LZW CodeSize: reject BitsPerPixel < 2 (CodeSize 0 and 1 create
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degenerate LZW states where ClearCode/EOFCode are unreachable).
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egif_lib.c:
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- PixelCount: same (unsigned long) fix as dgif_lib.c.
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- EGifSpew: cast j to (size_t) in pointer arithmetic j * SavedWidth
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to prevent int*int overflow in raster offset computation.
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gifalloc.c:
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- GifApplyTranslation: use size_t for RasterSize and loop counter
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instead of int to prevent Height*Width overflow.
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- GifMakeSavedImage: cast Height to (size_t) in reallocarray nmemb
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and memcpy size to prevent int*int overflow before reaching
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reallocarray's internal overflow check.
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quantize.c:
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- Compute PixelCount as (size_t)Width * Height with division-based
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overflow guard. Use size_t loop counter for pixel iteration.
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- Replace signed (long) cast of pixel count with (unsigned long).
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All 51 regression tests pass. Compiles with zero warnings under
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-Wall -O2.
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Signed-off-by: Anthony Hurtado <amhurtado@pm.me>
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---
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dgif_lib.c | 5 +++--
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egif_lib.c | 7 ++++---
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gifalloc.c | 16 ++++++++--------
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quantize.c | 39 +++++++++++++++++++++++----------------
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4 files changed, 38 insertions(+), 29 deletions(-)
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diff --git a/dgif_lib.c b/dgif_lib.c
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index cec94c1..a022bb6 100644
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--- a/dgif_lib.c
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+++ b/dgif_lib.c
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@@ -416,7 +416,8 @@ int DGifGetImageHeader(GifFileType *GifFile) {
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}
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Private->PixelCount =
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- (long)GifFile->Image.Width * (long)GifFile->Image.Height;
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+ (unsigned long)GifFile->Image.Width *
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+ (unsigned long)GifFile->Image.Height;
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/* Reset decompress algorithm parameters. */
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return DGifSetupDecompress(GifFile);
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@@ -824,7 +825,7 @@ static int DGifSetupDecompress(GifFileType *GifFile) {
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BitsPerPixel = CodeSize;
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/* this can only happen on a severely malformed GIF */
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- if (BitsPerPixel > 8) {
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+ if (BitsPerPixel < 2 || BitsPerPixel > 8) {
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GifFile->Error =
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D_GIF_ERR_READ_FAILED; /* somewhat bogus error code */
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return GIF_ERROR; /* Failed to read Code size. */
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diff --git a/egif_lib.c b/egif_lib.c
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index d74e8df..6f7c9b6 100644
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--- a/egif_lib.c
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+++ b/egif_lib.c
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@@ -448,7 +448,8 @@ int EGifPutImageDesc(GifFileType *GifFile, const int Left, const int Top,
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/* Mark this file as has screen descriptor: */
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Private->FileState |= FILE_STATE_IMAGE;
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- Private->PixelCount = (long)Width * (long)Height;
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+ Private->PixelCount =
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+ (unsigned long)Width * (unsigned long)Height;
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/* Reset compress algorithm parameters. */
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(void)EGifSetupCompress(GifFile);
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@@ -1154,7 +1155,7 @@ int EGifSpew(GifFileType *GifFileOut, int *ErrorCode) {
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j += InterlacedJumps[k]) {
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if (EGifPutLine(
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GifFileOut,
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- sp->RasterBits + j * SavedWidth,
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+ sp->RasterBits + (size_t)j * SavedWidth,
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SavedWidth) == GIF_ERROR) {
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status = GIF_ERROR;
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err = GifFileOut->Error;
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@@ -1165,7 +1166,7 @@ int EGifSpew(GifFileType *GifFileOut, int *ErrorCode) {
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} else {
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for (j = 0; j < SavedHeight; j++) {
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if (EGifPutLine(GifFileOut,
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- sp->RasterBits + j * SavedWidth,
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+ sp->RasterBits + (size_t)j * SavedWidth,
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SavedWidth) == GIF_ERROR) {
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status = GIF_ERROR;
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err = GifFileOut->Error;
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diff --git a/gifalloc.c b/gifalloc.c
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index 3d897ab..886907d 100644
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--- a/gifalloc.c
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+++ b/gifalloc.c
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@@ -210,9 +210,9 @@ ColorMapObject *GifUnionColorMap(const ColorMapObject *ColorIn1,
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Apply a given color translation to the raster bits of an image
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*******************************************************************************/
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void GifApplyTranslation(SavedImage *Image, const GifPixelType Translation[]) {
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- register int i;
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- register int RasterSize =
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- Image->ImageDesc.Height * Image->ImageDesc.Width;
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+ size_t i;
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+ size_t RasterSize =
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+ (size_t)Image->ImageDesc.Height * Image->ImageDesc.Width;
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for (i = 0; i < RasterSize; i++) {
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Image->RasterBits[i] = Translation[Image->RasterBits[i]];
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@@ -371,17 +371,17 @@ SavedImage *GifMakeSavedImage(GifFileType *GifFile,
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/* next, the raster */
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sp->RasterBits = (unsigned char *)reallocarray(
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NULL,
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- (CopyFrom->ImageDesc.Height *
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- CopyFrom->ImageDesc.Width),
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+ (size_t)CopyFrom->ImageDesc.Height *
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+ CopyFrom->ImageDesc.Width,
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sizeof(GifPixelType));
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if (sp->RasterBits == NULL) {
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FreeLastSavedImage(GifFile);
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return (SavedImage *)(NULL);
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}
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memcpy(sp->RasterBits, CopyFrom->RasterBits,
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- sizeof(GifPixelType) *
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- CopyFrom->ImageDesc.Height *
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- CopyFrom->ImageDesc.Width);
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+ (size_t)CopyFrom->ImageDesc.Height *
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+ CopyFrom->ImageDesc.Width *
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+ sizeof(GifPixelType));
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/* finally, the extension blocks */
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if (CopyFrom->ExtensionBlocks != NULL) {
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diff --git a/quantize.c b/quantize.c
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index 160a29b..4ea44ce 100644
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--- a/quantize.c
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+++ b/quantize.c
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@@ -71,6 +71,7 @@ int GifQuantizeBuffer(unsigned int Width, unsigned int Height,
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long Red, Green, Blue;
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NewColorMapType NewColorSubdiv[256];
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QuantizedColorType *ColorArrayEntries, *QuantizedColor;
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+ size_t k, PixelCount;
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ColorArrayEntries = (QuantizedColorType *)malloc(
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sizeof(QuantizedColorType) * COLOR_ARRAY_SIZE);
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@@ -78,6 +79,12 @@ int GifQuantizeBuffer(unsigned int Width, unsigned int Height,
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return GIF_ERROR;
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}
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+ PixelCount = (size_t)Width * Height;
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+ if (Width != 0 && PixelCount / Width != Height) {
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+ free((char *)ColorArrayEntries);
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+ return GIF_ERROR;
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+ }
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+
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for (i = 0; i < COLOR_ARRAY_SIZE; i++) {
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ColorArrayEntries[i].RGB[0] = i >> (2 * BITS_PER_PRIM_COLOR);
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ColorArrayEntries[i].RGB[1] =
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@@ -87,12 +94,12 @@ int GifQuantizeBuffer(unsigned int Width, unsigned int Height,
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}
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/* Sample the colors and their distribution: */
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- for (i = 0; i < (int)(Width * Height); i++) {
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- Index = ((RedInput[i] >> (8 - BITS_PER_PRIM_COLOR))
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+ for (k = 0; k < PixelCount; k++) {
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+ Index = ((RedInput[k] >> (8 - BITS_PER_PRIM_COLOR))
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<< (2 * BITS_PER_PRIM_COLOR)) +
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- ((GreenInput[i] >> (8 - BITS_PER_PRIM_COLOR))
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+ ((GreenInput[k] >> (8 - BITS_PER_PRIM_COLOR))
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<< BITS_PER_PRIM_COLOR) +
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- (BlueInput[i] >> (8 - BITS_PER_PRIM_COLOR));
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+ (BlueInput[k] >> (8 - BITS_PER_PRIM_COLOR));
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ColorArrayEntries[Index].Count++;
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}
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@@ -127,7 +134,7 @@ int GifQuantizeBuffer(unsigned int Width, unsigned int Height,
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NewColorSubdiv[0].NumEntries =
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NumOfEntries; /* Different sampled colors */
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- NewColorSubdiv[0].Count = ((long)Width) * Height; /* Pixels */
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+ NewColorSubdiv[0].Count = (unsigned long)PixelCount; /* Pixels */
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NewColorMapSize = 1;
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if (SubdivColorMap(NewColorSubdiv, *ColorMapSize, &NewColorMapSize) !=
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GIF_OK) {
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@@ -167,28 +174,28 @@ int GifQuantizeBuffer(unsigned int Width, unsigned int Height,
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/* Finally scan the input buffer again and put the mapped index in the
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* output buffer. */
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MaxRGBError[0] = MaxRGBError[1] = MaxRGBError[2] = 0;
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- for (i = 0; i < (int)(Width * Height); i++) {
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- Index = ((RedInput[i] >> (8 - BITS_PER_PRIM_COLOR))
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+ for (k = 0; k < PixelCount; k++) {
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+ Index = ((RedInput[k] >> (8 - BITS_PER_PRIM_COLOR))
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<< (2 * BITS_PER_PRIM_COLOR)) +
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- ((GreenInput[i] >> (8 - BITS_PER_PRIM_COLOR))
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+ ((GreenInput[k] >> (8 - BITS_PER_PRIM_COLOR))
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<< BITS_PER_PRIM_COLOR) +
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- (BlueInput[i] >> (8 - BITS_PER_PRIM_COLOR));
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+ (BlueInput[k] >> (8 - BITS_PER_PRIM_COLOR));
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Index = ColorArrayEntries[Index].NewColorIndex;
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- OutputBuffer[i] = Index;
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+ OutputBuffer[k] = Index;
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if (MaxRGBError[0] <
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- ABS(OutputColorMap[Index].Red - RedInput[i])) {
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+ ABS(OutputColorMap[Index].Red - RedInput[k])) {
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MaxRGBError[0] =
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- ABS(OutputColorMap[Index].Red - RedInput[i]);
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+ ABS(OutputColorMap[Index].Red - RedInput[k]);
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}
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if (MaxRGBError[1] <
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- ABS(OutputColorMap[Index].Green - GreenInput[i])) {
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+ ABS(OutputColorMap[Index].Green - GreenInput[k])) {
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MaxRGBError[1] =
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- ABS(OutputColorMap[Index].Green - GreenInput[i]);
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+ ABS(OutputColorMap[Index].Green - GreenInput[k]);
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}
|
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if (MaxRGBError[2] <
|
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- ABS(OutputColorMap[Index].Blue - BlueInput[i])) {
|
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+ ABS(OutputColorMap[Index].Blue - BlueInput[k])) {
|
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MaxRGBError[2] =
|
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- ABS(OutputColorMap[Index].Blue - BlueInput[i]);
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+ ABS(OutputColorMap[Index].Blue - BlueInput[k]);
|
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}
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}
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--
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2.55.0
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+28
@@ -0,0 +1,28 @@
|
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From 4a4fb2131c48b912b762a0c9915a2d717de7132a Mon Sep 17 00:00:00 2001
|
||||
From: "Eric S. Raymond" <esr@thyrsus.com>
|
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Date: Wed, 10 Jun 2026 17:00:29 -0400
|
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Subject: [PATCH 3/3] Resolve ticket #203: GifUnionColorMap NULL Pointer
|
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Dereference
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---
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gifalloc.c | 4 ++++
|
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1 file changed, 4 insertions(+)
|
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|
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diff --git a/gifalloc.c b/gifalloc.c
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index 886907d..e36684b 100644
|
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--- a/gifalloc.c
|
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+++ b/gifalloc.c
|
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@@ -114,6 +114,10 @@ ColorMapObject *GifUnionColorMap(const ColorMapObject *ColorIn1,
|
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int i, j, CrntSlot, RoundUpTo, NewGifBitSize;
|
||||
ColorMapObject *ColorUnion;
|
||||
|
||||
+ if (ColorIn1 == NULL || ColorIn2 == NULL) {
|
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+ return (NULL);
|
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+ }
|
||||
+
|
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/*
|
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* We don't worry about duplicates within either color map; if
|
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* the caller wants to resolve those, he can perform unions
|
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--
|
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2.55.0
|
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|
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@@ -1,30 +0,0 @@
|
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From ccbc956432650734c91acb3fc88837f7b81267ff Mon Sep 17 00:00:00 2001
|
||||
From: "Eric S. Raymond" <esr@thyrsus.com>
|
||||
Date: Wed, 21 Feb 2024 18:55:00 -0500
|
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Subject: [PATCH] Clean up memory better at end of run (CVE-2021-40633)
|
||||
|
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---
|
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gif2rgb.c | 3 +++
|
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1 file changed, 3 insertions(+)
|
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|
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diff --git a/gif2rgb.c b/gif2rgb.c
|
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index d51226d..fc2e683 100644
|
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--- a/gif2rgb.c
|
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+++ b/gif2rgb.c
|
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@@ -515,10 +515,13 @@ static void GIF2RGB(int NumFiles, char *FileName, bool OneFileFlag,
|
||||
}
|
||||
|
||||
DumpScreen2RGB(OutFileName, OneFileFlag, ColorMap, ScreenBuffer,
|
||||
GifFile->SWidth, GifFile->SHeight);
|
||||
|
||||
+ for (i = 0; i < GifFile->SHeight; i++) {
|
||||
+ (void)free(ScreenBuffer[i]);
|
||||
+ }
|
||||
(void)free(ScreenBuffer);
|
||||
|
||||
{
|
||||
int Error;
|
||||
if (DGifCloseFile(GifFile, &Error) == GIF_ERROR) {
|
||||
--
|
||||
2.43.0
|
||||
|
||||
@@ -1,58 +0,0 @@
|
||||
From 61f375082c80ee479eb8ff03189aea691a6a06aa Mon Sep 17 00:00:00 2001
|
||||
From: "Eric S. Raymond" <esr@thyrsus.com>
|
||||
Date: Wed, 21 Feb 2024 08:33:51 -0500
|
||||
Subject: [PATCH] Correct document page install.
|
||||
|
||||
---
|
||||
Makefile | 13 +++++++++----
|
||||
1 file changed, 9 insertions(+), 4 deletions(-)
|
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|
||||
diff --git a/Makefile b/Makefile
|
||||
index 87966a9..f4ecb24 100644
|
||||
--- a/Makefile
|
||||
+++ b/Makefile
|
||||
@@ -61,19 +61,23 @@ UTILS = $(INSTALLABLE) \
|
||||
gifsponge \
|
||||
gifwedge
|
||||
|
||||
LDLIBS=libgif.a -lm
|
||||
|
||||
-MANUAL_PAGES = \
|
||||
+MANUAL_PAGES_1 = \
|
||||
doc/gif2rgb.xml \
|
||||
doc/gifbuild.xml \
|
||||
doc/gifclrmp.xml \
|
||||
doc/giffix.xml \
|
||||
- doc/giflib.xml \
|
||||
doc/giftext.xml \
|
||||
doc/giftool.xml
|
||||
|
||||
+MANUAL_PAGES_7 = \
|
||||
+ doc/giflib.xml
|
||||
+
|
||||
+MANUAL_PAGES = $(MANUAL_PAGES_1) $(MANUAL_PAGES_7)
|
||||
+
|
||||
SOEXTENSION = so
|
||||
LIBGIFSO = libgif.$(SOEXTENSION)
|
||||
LIBGIFSOMAJOR = libgif.$(SOEXTENSION).$(LIBMAJOR)
|
||||
LIBGIFSOVER = libgif.$(SOEXTENSION).$(LIBVER)
|
||||
LIBUTILSO = libutil.$(SOEXTENSION)
|
||||
@@ -146,12 +150,13 @@ install-lib:
|
||||
$(INSTALL) -m 644 libgif.a "$(DESTDIR)$(LIBDIR)/libgif.a"
|
||||
$(INSTALL) -m 755 $(LIBGIFSO) "$(DESTDIR)$(LIBDIR)/$(LIBGIFSOVER)"
|
||||
ln -sf $(LIBGIFSOVER) "$(DESTDIR)$(LIBDIR)/$(LIBGIFSOMAJOR)"
|
||||
ln -sf $(LIBGIFSOMAJOR) "$(DESTDIR)$(LIBDIR)/$(LIBGIFSO)"
|
||||
install-man:
|
||||
- $(INSTALL) -d "$(DESTDIR)$(MANDIR)/man1"
|
||||
- $(INSTALL) -m 644 $(MANUAL_PAGES) "$(DESTDIR)$(MANDIR)/man1"
|
||||
+ $(INSTALL) -d "$(DESTDIR)$(MANDIR)/man1" "$(DESTDIR)$(MANDIR)/man7"
|
||||
+ $(INSTALL) -m 644 $(MANUAL_PAGES_1:xml=1) "$(DESTDIR)$(MANDIR)/man1"
|
||||
+ $(INSTALL) -m 644 $(MANUAL_PAGES_7:xml=7) "$(DESTDIR)$(MANDIR)/man7"
|
||||
uninstall: uninstall-man uninstall-include uninstall-lib uninstall-bin
|
||||
uninstall-bin:
|
||||
cd "$(DESTDIR)$(BINDIR)" && rm -f $(INSTALLABLE)
|
||||
uninstall-include:
|
||||
rm -f "$(DESTDIR)$(INCDIR)/gif_lib.h"
|
||||
--
|
||||
2.43.0
|
||||
|
||||
@@ -1,19 +0,0 @@
|
||||
Upstream: No
|
||||
Reason: restores deprecated GifQuantizeBuffer which some packages (notably libgdiplus) still use
|
||||
|
||||
--- a/Makefile
|
||||
+++ b/Makefile
|
||||
@@ -95,11 +95,11 @@
|
||||
|
||||
$(UTILS):: libgif.a libutil.a
|
||||
|
||||
-$(LIBGIFSO): $(OBJECTS) $(HEADERS)
|
||||
+$(LIBGIFSO): $(OBJECTS) $(HEADERS) $(UOBJECTS)
|
||||
ifeq ($(UNAME), Darwin)
|
||||
$(CC) $(CFLAGS) -dynamiclib -current_version $(LIBVER) $(OBJECTS) -o $(LIBGIFSO)
|
||||
else
|
||||
- $(CC) $(CFLAGS) -shared $(LDFLAGS) -Wl,-soname -Wl,$(LIBGIFSOMAJOR) -o $(LIBGIFSO) $(OBJECTS)
|
||||
+ $(CC) $(CFLAGS) -shared $(LDFLAGS) -Wl,-soname -Wl,$(LIBGIFSOMAJOR) -o $(LIBGIFSO) $(OBJECTS) $(UOBJECTS)
|
||||
endif
|
||||
|
||||
libgif.a: $(OBJECTS) $(HEADERS)
|
||||
@@ -1,21 +1,22 @@
|
||||
# Template file for 'giflib'
|
||||
pkgname=giflib
|
||||
version=5.2.2
|
||||
version=6.1.3
|
||||
revision=1
|
||||
build_style=gnu-makefile
|
||||
make_check_target="test"
|
||||
hostmakedepends="xmlto"
|
||||
short_desc="Library to handle, display and manipulate GIF images"
|
||||
maintainer="Orphaned <orphan@voidlinux.org>"
|
||||
license="MIT"
|
||||
homepage="https://sourceforge.net/projects/giflib/"
|
||||
distfiles="${SOURCEFORGE_SITE}/${pkgname}/${pkgname}-${version}.tar.gz"
|
||||
checksum=be7ffbd057cadebe2aa144542fd90c6838c6a083b5e8a9048b8ee3b66b29d5fb
|
||||
checksum=b65b66b99f0424b93525f987386f22fc5efb9da2bfc92ad4a532249aaffbab0e
|
||||
|
||||
CFLAGS="-fPIC"
|
||||
|
||||
post_patch() {
|
||||
# don't build images for html doc, requires ImageMackig
|
||||
vsed -i doc/Makefile -e '/^allhtml/s/giflib-logo.gif//'
|
||||
vsed -i doc/Makefile -e '/^website/s/giflib-logo\.gif//'
|
||||
}
|
||||
|
||||
post_install() {
|
||||
|
||||
Reference in New Issue
Block a user