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
|
This patch is submitted to upstream for CVE-2012-1173
diff -Naur tiff-3.9.5.orig/libtiff/tif_getimage.c tiff-3.9.5/libtiff/tif_getimage.c
--- tiff-3.9.5.orig/libtiff/tif_getimage.c 2010-07-08 12:17:59.000000000 -0400
+++ tiff-3.9.5/libtiff/tif_getimage.c 2012-03-14 14:49:25.796728783 -0400
@@ -673,18 +673,24 @@
unsigned char* p2;
unsigned char* pa;
tsize_t tilesize;
+ tsize_t bufsize;
int32 fromskew, toskew;
int alpha = img->alpha;
uint32 nrow;
int ret = 1, flip;
tilesize = TIFFTileSize(tif);
- buf = (unsigned char*) _TIFFmalloc((alpha?4:3)*tilesize);
+ bufsize = TIFFSafeMultiply(tsize_t,alpha?4:3,tilesize);
+ if (bufsize == 0) {
+ TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtTileSeparate");
+ return (0);
+ }
+ buf = (unsigned char*) _TIFFmalloc(bufsize);
if (buf == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for tile buffer");
return (0);
}
- _TIFFmemset(buf, 0, (alpha?4:3)*tilesize);
+ _TIFFmemset(buf, 0, bufsize);
p0 = buf;
p1 = p0 + tilesize;
p2 = p1 + tilesize;
@@ -880,17 +886,23 @@
uint32 rowsperstrip, offset_row;
uint32 imagewidth = img->width;
tsize_t stripsize;
+ tsize_t bufsize;
int32 fromskew, toskew;
int alpha = img->alpha;
int ret = 1, flip;
stripsize = TIFFStripSize(tif);
- p0 = buf = (unsigned char *)_TIFFmalloc((alpha?4:3)*stripsize);
+ bufsize = TIFFSafeMultiply(tsize_t,alpha?4:3,stripsize);
+ if (bufsize == 0) {
+ TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtStripSeparate");
+ return (0);
+ }
+ p0 = buf = (unsigned char *)_TIFFmalloc(bufsize);
if (buf == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for tile buffer");
return (0);
}
- _TIFFmemset(buf, 0, (alpha?4:3)*stripsize);
+ _TIFFmemset(buf, 0, bufsize);
p1 = p0 + stripsize;
p2 = p1 + stripsize;
pa = (alpha?(p2+stripsize):NULL);
diff -Naur tiff-3.9.5.orig/libtiff/tiffiop.h tiff-3.9.5/libtiff/tiffiop.h
--- tiff-3.9.5.orig/libtiff/tiffiop.h 2011-03-28 09:43:43.000000000 -0400
+++ tiff-3.9.5/libtiff/tiffiop.h 2012-03-14 14:49:25.797728754 -0400
@@ -246,7 +246,7 @@
#define TIFFroundup(x, y) (TIFFhowmany(x,y)*(y))
/* Safe multiply which returns zero if there is an integer overflow */
-#define TIFFSafeMultiply(t,v,m) ((((t)m != (t)0) && (((t)((v*m)/m)) == (t)v)) ? (t)(v*m) : (t)0)
+#define TIFFSafeMultiply(t,v,m) ((((t)(m) != (t)0) && (((t)(((v)*(m))/(m))) == (t)(v))) ? (t)((v)*(m)) : (t)0)
#define TIFFmax(A,B) ((A)>(B)?(A):(B))
#define TIFFmin(A,B) ((A)<(B)?(A):(B))
|
