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-rw-r--r--gnu/packages/patches/gegl-CVE-2012-4433.patch117
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: