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SUSE:SLE-12-SP2:Update
gimp.17713
gimp-bgo773233-CVE-2007-3126.patch
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File gimp-bgo773233-CVE-2007-3126.patch of Package gimp.17713
From 323ecb73f7bf36788fb7066eb2d6678830cd5de7 Mon Sep 17 00:00:00 2001 From: Michael Natterer <mitch@gimp.org> Date: Sun, 6 Nov 2016 21:34:43 +0100 Subject: Bug 773233 - CVE-2007-3126 - Gimp 2.3.14 allows context-dependent attackers... ...to cause a denial of service (crash) via an ICO file with an InfoHeader containing a Height of zero Add some error handling to ico-load.c and bail out on zero width or height icons. Also some formatting cleanup. (cherry picked from commit 46bcd82800e37b0f5aead76184430ef2fe802748) --- plug-ins/file-ico/ico-load.c | 103 ++++++++++++++++++++++++++----------------- 1 file changed, 62 insertions(+), 41 deletions(-) diff --git a/plug-ins/file-ico/ico-load.c b/plug-ins/file-ico/ico-load.c index fde543a..0075eab 100644 --- a/plug-ins/file-ico/ico-load.c +++ b/plug-ins/file-ico/ico-load.c @@ -124,15 +124,17 @@ static guint32 ico_read_init (FILE *fp) { IcoFileHeader header; + /* read and check file header */ - if (!ico_read_int16 (fp, &header.reserved, 1) - || !ico_read_int16 (fp, &header.resource_type, 1) - || !ico_read_int16 (fp, &header.icon_count, 1) - || header.reserved != 0 - || header.resource_type != 1) + if (! ico_read_int16 (fp, &header.reserved, 1) || + ! ico_read_int16 (fp, &header.resource_type, 1) || + ! ico_read_int16 (fp, &header.icon_count, 1) || + header.reserved != 0 || + header.resource_type != 1) { return 0; } + return header.icon_count; } @@ -148,22 +150,25 @@ ico_read_size (FILE *fp, gint32 color_type; guint32 magic; - if ( fseek (fp, info->offset, SEEK_SET) < 0 ) + if (fseek (fp, info->offset, SEEK_SET) < 0) return FALSE; ico_read_int32 (fp, &magic, 1); + if (magic == ICO_PNG_MAGIC) { png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); - if (! png_ptr ) + if (! png_ptr) return FALSE; + info_ptr = png_create_info_struct (png_ptr); - if (! info_ptr ) + if (! info_ptr) { png_destroy_read_struct (&png_ptr, NULL, NULL); return FALSE; } + if (setjmp (png_jmpbuf (png_ptr))) { png_destroy_read_struct (&png_ptr, NULL, NULL); @@ -182,8 +187,8 @@ ico_read_size (FILE *fp, } else if (magic == 40) { - if (ico_read_int32 (fp, &info->width, 1) - && ico_read_int32 (fp, &info->height, 1)) + if (ico_read_int32 (fp, &info->width, 1) && + ico_read_int32 (fp, &info->height, 1)) { info->height /= 2; D(("ico_read_size: ICO: %ix%i\n", info->width, info->height)); @@ -200,8 +205,9 @@ ico_read_size (FILE *fp, } static IcoLoadInfo* -ico_read_info (FILE *fp, - gint icon_count) +ico_read_info (FILE *fp, + gint icon_count, + GError **error) { gint i; IcoFileEntry *entries; @@ -209,8 +215,11 @@ ico_read_info (FILE *fp, /* read icon entries */ entries = g_new (IcoFileEntry, icon_count); - if ( fread (entries, sizeof(IcoFileEntry), icon_count, fp) <= 0 ) + if (fread (entries, sizeof (IcoFileEntry), icon_count, fp) <= 0) { + g_set_error (error, G_FILE_ERROR, 0, + _("Could not read '%lu' bytes"), + sizeof (IcoFileEntry)); g_free (entries); return NULL; } @@ -218,23 +227,33 @@ ico_read_info (FILE *fp, info = g_new (IcoLoadInfo, icon_count); for (i = 0; i < icon_count; i++) { - info[i].width = entries[i].width; + info[i].width = entries[i].width; info[i].height = entries[i].height; - info[i].bpp = GUINT16_FROM_LE (entries[i].bpp); - info[i].size = GUINT32_FROM_LE (entries[i].size); + info[i].bpp = GUINT16_FROM_LE (entries[i].bpp); + info[i].size = GUINT32_FROM_LE (entries[i].size); info[i].offset = GUINT32_FROM_LE (entries[i].offset); if (info[i].width == 0 || info[i].height == 0) { - ico_read_size (fp, info+i); + ico_read_size (fp, info + i); } D(("ico_read_info: %ix%i (%i bits, size: %i, offset: %i)\n", info[i].width, info[i].height, info[i].bpp, info[i].size, info[i].offset)); + + if (info[i].width == 0 || info[i].height == 0) + { + g_set_error (error, G_FILE_ERROR, 0, + _("Icon #%d has zero width or height"), i); + g_free (info); + g_free (entries); + return NULL; + } } g_free (entries); + return info; } @@ -256,10 +275,10 @@ ico_read_png (FILE *fp, gint i; png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); - if (! png_ptr ) + if (! png_ptr) return FALSE; info = png_create_info_struct (png_ptr); - if (! info ) + if (! info) { png_destroy_read_struct (&png_ptr, NULL, NULL); return FALSE; @@ -287,14 +306,14 @@ ico_read_png (FILE *fp, { case PNG_COLOR_TYPE_GRAY: png_set_expand_gray_1_2_4_to_8 (png_ptr); - if ( bit_depth == 16 ) + if (bit_depth == 16) png_set_strip_16 (png_ptr); png_set_gray_to_rgb (png_ptr); png_set_add_alpha (png_ptr, 0xff, PNG_FILLER_AFTER); break; case PNG_COLOR_TYPE_GRAY_ALPHA: png_set_expand_gray_1_2_4_to_8 (png_ptr); - if ( bit_depth == 16 ) + if (bit_depth == 16) png_set_strip_16 (png_ptr); png_set_gray_to_rgb (png_ptr); break; @@ -427,16 +446,18 @@ ico_read_icon (FILE *fp, data.planes, data.image_size, data.bpp, data.used_clrs, data.important_clrs)); - if (data.planes != 1 - || data.compression != 0) + if (data.planes != 1 || + data.compression != 0) { D(("skipping image: invalid header\n")); return FALSE; } - if (data.bpp != 1 && data.bpp != 4 - && data.bpp != 8 && data.bpp != 24 - && data.bpp != 32) + if (data.bpp != 1 && + data.bpp != 4 && + data.bpp != 8 && + data.bpp != 24 && + data.bpp != 32) { D(("skipping image: invalid depth: %i\n", data.bpp)); return FALSE; @@ -591,8 +612,8 @@ ico_load_layer (FILE *fp, GimpPixelRgn pixel_rgn; gchar buf [ICO_MAXBUF]; - if ( fseek (fp, info->offset, SEEK_SET) < 0 - || !ico_read_int32 (fp, &first_bytes, 1) ) + if (fseek (fp, info->offset, SEEK_SET) < 0 || + ! ico_read_int32 (fp, &first_bytes, 1)) return -1; if (first_bytes == ICO_PNG_MAGIC) @@ -645,7 +666,7 @@ ico_load_image (const gchar *filename, gimp_filename_to_utf8 (filename)); fp = g_fopen (filename, "rb"); - if (! fp ) + if (! fp) { g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), _("Could not open '%s' for reading: %s"), @@ -660,8 +681,8 @@ ico_load_image (const gchar *filename, return -1; } - info = ico_read_info (fp, icon_count); - if (!info) + info = ico_read_info (fp, icon_count, error); + if (! info) { fclose (fp); return -1; @@ -672,12 +693,12 @@ ico_load_image (const gchar *filename, max_height = 0; for (i = 0; i < icon_count; i++) { - if ( info[i].width > max_width ) + if (info[i].width > max_width) max_width = info[i].width; - if ( info[i].height > max_height ) + if (info[i].height > max_height) max_height = info[i].height; } - if ( max_width <= 0 || max_height <= 0 ) + if (max_width <= 0 || max_height <= 0) { g_free (info); fclose (fp); @@ -723,7 +744,7 @@ ico_load_thumbnail_image (const gchar *filename, gimp_filename_to_utf8 (filename)); fp = g_fopen (filename, "rb"); - if (! fp ) + if (! fp) { g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno), _("Could not open '%s' for reading: %s"), @@ -732,7 +753,7 @@ ico_load_thumbnail_image (const gchar *filename, } icon_count = ico_read_init (fp); - if (! icon_count ) + if (! icon_count) { fclose (fp); return -1; @@ -741,8 +762,8 @@ ico_load_thumbnail_image (const gchar *filename, D(("*** %s: Microsoft icon file, containing %i icon(s)\n", filename, icon_count)); - info = ico_read_info (fp, icon_count); - if (! info ) + info = ico_read_info (fp, icon_count, error); + if (! info) { fclose (fp); return -1; @@ -760,9 +781,9 @@ ico_load_thumbnail_image (const gchar *filename, match = i; } - else if ( w == info[i].width - && h == info[i].height - && info[i].bpp > bpp ) + else if (w == info[i].width && + h == info[i].height && + info[i].bpp > bpp) { /* better quality */ bpp = info[i].bpp; -- cgit v0.12
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