diff options
Diffstat (limited to 'gnu/packages/patches/freeimage-CVE-2015-0852.patch')
| -rw-r--r-- | gnu/packages/patches/freeimage-CVE-2015-0852.patch | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/gnu/packages/patches/freeimage-CVE-2015-0852.patch b/gnu/packages/patches/freeimage-CVE-2015-0852.patch new file mode 100644 index 0000000000..34d538e925 --- /dev/null +++ b/gnu/packages/patches/freeimage-CVE-2015-0852.patch @@ -0,0 +1,129 @@ +Copied from Debian. + +Description: fix integer overflow +Origin: upstream + http://freeimage.cvs.sourceforge.net/viewvc/freeimage/FreeImage/Source/FreeImage/PluginPCX.cpp?view=patch&r1=1.17&r2=1.18&pathrev=MAIN + http://freeimage.cvs.sourceforge.net/viewvc/freeimage/FreeImage/Source/FreeImage/PluginPCX.cpp?view=patch&r1=1.18&r2=1.19&pathrev=MAIN +Bug-Debian: https://bugs.debian.org/797165 +Last-Update: 2015-09-14 +--- +This patch header follows DEP-3: http://dep.debian.net/deps/dep3/ +Index: freeimage/Source/FreeImage/PluginPCX.cpp +=================================================================== +--- freeimage.orig/Source/FreeImage/PluginPCX.cpp ++++ freeimage/Source/FreeImage/PluginPCX.cpp +@@ -347,12 +347,14 @@ Load(FreeImageIO *io, fi_handle handle, + + try { + // check PCX identifier +- +- long start_pos = io->tell_proc(handle); +- BOOL validated = pcx_validate(io, handle); +- io->seek_proc(handle, start_pos, SEEK_SET); +- if(!validated) { +- throw FI_MSG_ERROR_MAGIC_NUMBER; ++ // (note: should have been already validated using FreeImage_GetFileType but check again) ++ { ++ long start_pos = io->tell_proc(handle); ++ BOOL validated = pcx_validate(io, handle); ++ io->seek_proc(handle, start_pos, SEEK_SET); ++ if(!validated) { ++ throw FI_MSG_ERROR_MAGIC_NUMBER; ++ } + } + + // process the header +@@ -366,20 +368,38 @@ Load(FreeImageIO *io, fi_handle handle, + SwapHeader(&header); + #endif + +- // allocate a new DIB ++ // process the window ++ const WORD *window = header.window; // left, upper, right,lower pixel coord. ++ const int left = window[0]; ++ const int top = window[1]; ++ const int right = window[2]; ++ const int bottom = window[3]; + +- unsigned width = header.window[2] - header.window[0] + 1; +- unsigned height = header.window[3] - header.window[1] + 1; +- unsigned bitcount = header.bpp * header.planes; +- +- if (bitcount == 24) { +- dib = FreeImage_AllocateHeader(header_only, width, height, bitcount, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK); +- } else { +- dib = FreeImage_AllocateHeader(header_only, width, height, bitcount); ++ // check image size ++ if((left >= right) || (top >= bottom)) { ++ throw FI_MSG_ERROR_PARSING; + } + +- // if the dib couldn't be allocated, throw an error ++ const unsigned width = right - left + 1; ++ const unsigned height = bottom - top + 1; ++ const unsigned bitcount = header.bpp * header.planes; ++ ++ // allocate a new DIB ++ switch(bitcount) { ++ case 1: ++ case 4: ++ case 8: ++ dib = FreeImage_AllocateHeader(header_only, width, height, bitcount); ++ break; ++ case 24: ++ dib = FreeImage_AllocateHeader(header_only, width, height, bitcount, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK); ++ break; ++ default: ++ throw FI_MSG_ERROR_DIB_MEMORY; ++ break; ++ } + ++ // if the dib couldn't be allocated, throw an error + if (!dib) { + throw FI_MSG_ERROR_DIB_MEMORY; + } +@@ -426,19 +446,23 @@ Load(FreeImageIO *io, fi_handle handle, + + if (palette_id == 0x0C) { + BYTE *cmap = (BYTE*)malloc(768 * sizeof(BYTE)); +- io->read_proc(cmap, 768, 1, handle); + +- pal = FreeImage_GetPalette(dib); +- BYTE *pColormap = &cmap[0]; ++ if(cmap) { ++ io->read_proc(cmap, 768, 1, handle); + +- for(int i = 0; i < 256; i++) { +- pal[i].rgbRed = pColormap[0]; +- pal[i].rgbGreen = pColormap[1]; +- pal[i].rgbBlue = pColormap[2]; +- pColormap += 3; ++ pal = FreeImage_GetPalette(dib); ++ BYTE *pColormap = &cmap[0]; ++ ++ for(int i = 0; i < 256; i++) { ++ pal[i].rgbRed = pColormap[0]; ++ pal[i].rgbGreen = pColormap[1]; ++ pal[i].rgbBlue = pColormap[2]; ++ pColormap += 3; ++ } ++ ++ free(cmap); + } + +- free(cmap); + } + + // wrong palette ID, perhaps a gray scale is needed ? +@@ -466,9 +490,9 @@ Load(FreeImageIO *io, fi_handle handle, + // calculate the line length for the PCX and the DIB + + // length of raster line in bytes +- unsigned linelength = header.bytes_per_line * header.planes; ++ const unsigned linelength = header.bytes_per_line * header.planes; + // length of DIB line (rounded to DWORD) in bytes +- unsigned pitch = FreeImage_GetPitch(dib); ++ const unsigned pitch = FreeImage_GetPitch(dib); + + // run-length encoding ? + |