diff options
Diffstat (limited to 'gnu/packages/patches/gegl-CVE-2012-4433.patch')
| -rw-r--r-- | gnu/packages/patches/gegl-CVE-2012-4433.patch | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/gnu/packages/patches/gegl-CVE-2012-4433.patch b/gnu/packages/patches/gegl-CVE-2012-4433.patch new file mode 100644 index 0000000000..7352b78dba --- /dev/null +++ b/gnu/packages/patches/gegl-CVE-2012-4433.patch @@ -0,0 +1,117 @@ +From: Michael Gilbert <mgilbert@debian.org> +Date: Mon, 9 Sep 2013 17:34:32 +0200 +Subject: Fix_CVE-2012-4433 + +Multiple buffer overflow issues. + +Closes: #692435 +--- + operations/external/ppm-load.c | 62 ++++++++++++++++++++++++++++++++++++------ + 1 file changed, 53 insertions(+), 9 deletions(-) + +diff --git a/operations/external/ppm-load.c b/operations/external/ppm-load.c +index efe6d56..465096d 100644 +--- a/operations/external/ppm-load.c ++++ b/operations/external/ppm-load.c +@@ -36,6 +36,7 @@ gegl_chant_file_path (path, _("File"), "", _("Path of file to load.")) + #include "gegl-chant.h" + #include <stdio.h> + #include <stdlib.h> ++#include <errno.h> + + typedef enum { + PIXMAP_ASCII = 51, +@@ -44,8 +45,8 @@ typedef enum { + + typedef struct { + map_type type; +- gint width; +- gint height; ++ glong width; ++ glong height; + gsize numsamples; /* width * height * channels */ + gsize bpc; /* bytes per channel */ + guchar *data; +@@ -82,12 +83,33 @@ ppm_load_read_header(FILE *fp, + } + + /* Get Width and Height */ +- img->width = strtol (header,&ptr,0); +- img->height = atoi (ptr); +- img->numsamples = img->width * img->height * CHANNEL_COUNT; ++ errno = 0; ++ img->width = strtol (header,&ptr,10); ++ if (errno) ++ { ++ g_warning ("Error reading width: %s", strerror(errno)); ++ return FALSE; ++ } ++ else if (img->width < 0) ++ { ++ g_warning ("Error: width is negative"); ++ return FALSE; ++ } ++ ++ img->height = strtol (ptr,&ptr,10); ++ if (errno) ++ { ++ g_warning ("Error reading height: %s", strerror(errno)); ++ return FALSE; ++ } ++ else if (img->width < 0) ++ { ++ g_warning ("Error: height is negative"); ++ return FALSE; ++ } + + fgets (header,MAX_CHARS_IN_ROW,fp); +- maxval = strtol (header,&ptr,0); ++ maxval = strtol (header,&ptr,10); + + if ((maxval != 255) && (maxval != 65535)) + { +@@ -109,6 +131,16 @@ ppm_load_read_header(FILE *fp, + g_warning ("%s: Programmer stupidity error", G_STRLOC); + } + ++ /* Later on, img->numsamples is multiplied with img->bpc to allocate ++ * memory. Ensure it doesn't overflow. */ ++ if (!img->width || !img->height || ++ G_MAXSIZE / img->width / img->height / CHANNEL_COUNT < img->bpc) ++ { ++ g_warning ("Illegal width/height: %ld/%ld", img->width, img->height); ++ return FALSE; ++ } ++ img->numsamples = img->width * img->height * CHANNEL_COUNT; ++ + return TRUE; + } + +@@ -229,12 +261,24 @@ process (GeglOperation *operation, + if (!ppm_load_read_header (fp, &img)) + goto out; + +- rect.height = img.height; +- rect.width = img.width; +- + /* Allocating Array Size */ ++ ++ /* Should use g_try_malloc(), but this causes crashes elsewhere because the ++ * error signalled by returning FALSE isn't properly acted upon. Therefore ++ * g_malloc() is used here which aborts if the requested memory size can't be ++ * allocated causing a controlled crash. */ + img.data = (guchar*) g_malloc (img.numsamples * img.bpc); + ++ /* No-op without g_try_malloc(), see above. */ ++ if (! img.data) ++ { ++ g_warning ("Couldn't allocate %" G_GSIZE_FORMAT " bytes, giving up.", ((gsize)img.numsamples * img.bpc)); ++ goto out; ++ } ++ ++ rect.height = img.height; ++ rect.width = img.width; ++ + switch (img.bpc) + { + case 1: |