1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
From 3d3b1559cb34bc862f145c9880d156f6f2fe7b5f Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Sat, 17 Nov 2012 16:22:21 +0100
Subject: [PATCH] ppm-load: CVE-2012-4433: add plausibility checks for header
fields
"Port" of 4757cdf73d3675478d645a3ec8250ba02168a230 by Nils Philippsen from GEGL 0.2.0 to 0.1.8
---
operations/external/ppm-load.c | 33 ++++++++++++++++++++++++++++-----
1 file changed, 28 insertions(+), 5 deletions(-)
diff --git a/operations/external/ppm-load.c b/operations/external/ppm-load.c
index 6db6e5a..2d4f0ca 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;
@@ -82,11 +83,33 @@ ppm_load_read_header(FILE *fp,
}
/* Get Width and Height */
- img->width = strtol (header,&ptr,0);
- img->height = atoi (ptr);
+ 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;
+ }
retval = fgets (header,MAX_CHARS_IN_ROW,fp);
- maxval = strtol (header,&ptr,0);
+ maxval = strtol (header,&ptr,10);
if ((maxval != 255) && (maxval != 65535))
{
--
1.7.12.4
|
GitWeb
