mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-30 08:02:38 -05:00
5f1ba08953
* gnu/packages/gimp.scm (gegl)[source]: Add patch. * gnu/packages/patches/gegl-CVE-2012-4433.patch: New variable. * gnu/local.mk (dist_patch_DATA): Add it.
117 lines
3.4 KiB
Diff
117 lines
3.4 KiB
Diff
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:
|