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nixpkgs/pkgs/development/libraries/libtiff/CVE-2019-14973.patch
Pierre Bourdon f15564d72b libtiff: patch for CVE-2019-6128, CVE-2019-14973 
CVE-2019-14973.patch is a manually backported of the upstream patch to
work around some minor merge conflicts.
2019-10-22 09:47:40 +02:00

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diff -ru tiff-4.0.10-orig/libtiff/tif_aux.c tiff-4.0.10/libtiff/tif_aux.c
--- tiff-4.0.10-orig/libtiff/tif_aux.c 2017-12-02 16:21:47.305709555 +0100
+++ tiff-4.0.10/libtiff/tif_aux.c 2019-10-02 22:35:17.392184463 +0200
@@ -57,18 +57,57 @@
return bytes;
}
+tmsize_t
+_TIFFMultiplySSize(TIFF* tif, tmsize_t first, tmsize_t second, const char* where)
+{
+ if( first <= 0 || second <= 0 )
+ {
+ if( tif != NULL && where != NULL )
+ {
+ TIFFErrorExt(tif->tif_clientdata, where,
+ "Invalid argument to _TIFFMultiplySSize() in %s", where);
+ }
+ return 0;
+ }
+
+ if( first > TIFF_TMSIZE_T_MAX / second )
+ {
+ if( tif != NULL && where != NULL )
+ {
+ TIFFErrorExt(tif->tif_clientdata, where,
+ "Integer overflow in %s", where);
+ }
+ return 0;
+ }
+ return first * second;
+}
+
+tmsize_t _TIFFCastUInt64ToSSize(TIFF* tif, uint64 val, const char* module)
+{
+ if( val > (uint64)TIFF_TMSIZE_T_MAX )
+ {
+ if( tif != NULL && module != NULL )
+ {
+ TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
+ }
+ return 0;
+ }
+ return (tmsize_t)val;
+}
+
void*
_TIFFCheckRealloc(TIFF* tif, void* buffer,
tmsize_t nmemb, tmsize_t elem_size, const char* what)
{
void* cp = NULL;
- tmsize_t bytes = nmemb * elem_size;
-
+ tmsize_t count = _TIFFMultiplySSize(tif, nmemb, elem_size, NULL);
/*
- * XXX: Check for integer overflow.
+ * Check for integer overflow.
*/
- if (nmemb && elem_size && bytes / elem_size == nmemb)
- cp = _TIFFrealloc(buffer, bytes);
+ if (count != 0)
+ {
+ cp = _TIFFrealloc(buffer, count);
+ }
if (cp == NULL) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
diff -ru tiff-4.0.10-orig/libtiff/tiffiop.h tiff-4.0.10/libtiff/tiffiop.h
--- tiff-4.0.10-orig/libtiff/tiffiop.h 2018-11-03 15:28:37.748910968 +0100
+++ tiff-4.0.10/libtiff/tiffiop.h 2019-10-02 22:35:17.396184535 +0200
@@ -77,6 +77,9 @@
#define FALSE 0
#endif
+#define TIFF_SIZE_T_MAX ((size_t) ~ ((size_t)0))
+#define TIFF_TMSIZE_T_MAX (tmsize_t)(TIFF_SIZE_T_MAX >> 1)
+
typedef struct client_info {
struct client_info *next;
void *data;
@@ -258,7 +261,7 @@
#define TIFFhowmany8_64(x) (((x)&0x07)?((uint64)(x)>>3)+1:(uint64)(x)>>3)
#define TIFFroundup_64(x, y) (TIFFhowmany_64(x,y)*(y))
-/* Safe multiply which returns zero if there is an integer overflow */
+/* Safe multiply which returns zero if there is an *unsigned* integer overflow. This macro is not safe for *signed* integer types */
#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))
@@ -368,6 +371,8 @@
extern uint32 _TIFFMultiply32(TIFF*, uint32, uint32, const char*);
extern uint64 _TIFFMultiply64(TIFF*, uint64, uint64, const char*);
+extern tmsize_t _TIFFMultiplySSize(TIFF*, tmsize_t, tmsize_t, const char*);
+extern tmsize_t _TIFFCastUInt64ToSSize(TIFF*, uint64, const char*);
extern void* _TIFFCheckMalloc(TIFF*, tmsize_t, tmsize_t, const char*);
extern void* _TIFFCheckRealloc(TIFF*, void*, tmsize_t, tmsize_t, const char*);
diff -ru tiff-4.0.10-orig/libtiff/tif_getimage.c tiff-4.0.10/libtiff/tif_getimage.c
--- tiff-4.0.10-orig/libtiff/tif_getimage.c 2017-12-02 16:21:47.654716127 +0100
+++ tiff-4.0.10/libtiff/tif_getimage.c 2019-10-02 22:35:17.393184481 +0200
@@ -755,9 +755,8 @@
uint32 leftmost_tw;
tilesize = TIFFTileSize(tif);
- bufsize = TIFFSafeMultiply(tmsize_t,alpha?4:3,tilesize);
+ bufsize = _TIFFMultiplySSize(tif, alpha?4:3,tilesize, "gtTileSeparate");
if (bufsize == 0) {
- TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtTileSeparate");
return (0);
}
@@ -1019,9 +1018,8 @@
uint16 colorchannels;
stripsize = TIFFStripSize(tif);
- bufsize = TIFFSafeMultiply(tmsize_t,alpha?4:3,stripsize);
+ bufsize = _TIFFMultiplySSize(tif,alpha?4:3,stripsize, "gtStripSeparate");
if (bufsize == 0) {
- TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtStripSeparate");
return (0);
}
diff -ru tiff-4.0.10-orig/libtiff/tif_luv.c tiff-4.0.10/libtiff/tif_luv.c
--- tiff-4.0.10-orig/libtiff/tif_luv.c 2018-05-05 15:50:35.884596907 +0200
+++ tiff-4.0.10/libtiff/tif_luv.c 2019-10-02 22:35:17.393184481 +0200
@@ -1264,16 +1264,10 @@
return (SGILOGDATAFMT_UNKNOWN);
}
-
-#define TIFF_SIZE_T_MAX ((size_t) ~ ((size_t)0))
-#define TIFF_TMSIZE_T_MAX (tmsize_t)(TIFF_SIZE_T_MAX >> 1)
-
static tmsize_t
multiply_ms(tmsize_t m1, tmsize_t m2)
{
- if( m1 == 0 || m2 > TIFF_TMSIZE_T_MAX / m1 )
- return 0;
- return m1 * m2;
+ return _TIFFMultiplySSize(NULL, m1, m2, NULL);
}
static int
diff -ru tiff-4.0.10-orig/libtiff/tif_pixarlog.c tiff-4.0.10/libtiff/tif_pixarlog.c
--- tiff-4.0.10-orig/libtiff/tif_pixarlog.c 2017-12-02 16:21:47.841162432 +0100
+++ tiff-4.0.10/libtiff/tif_pixarlog.c 2019-10-02 22:36:01.223970118 +0200
@@ -634,15 +634,10 @@
return guess;
}
-#define TIFF_SIZE_T_MAX ((size_t) ~ ((size_t)0))
-#define TIFF_TMSIZE_T_MAX (tmsize_t)(TIFF_SIZE_T_MAX >> 1)
-
static tmsize_t
multiply_ms(tmsize_t m1, tmsize_t m2)
{
- if( m1 == 0 || m2 > TIFF_TMSIZE_T_MAX / m1 )
- return 0;
- return m1 * m2;
+ return _TIFFMultiplySSize(NULL, m1, m2, NULL);
}
static tmsize_t
diff -ru tiff-4.0.10-orig/libtiff/tif_read.c tiff-4.0.10/libtiff/tif_read.c
--- tiff-4.0.10-orig/libtiff/tif_read.c 2018-10-14 21:15:27.551093695 +0200
+++ tiff-4.0.10/libtiff/tif_read.c 2019-10-02 22:41:09.387290927 +0200
@@ -29,9 +29,6 @@
#include "tiffiop.h"
#include <stdio.h>
-#define TIFF_SIZE_T_MAX ((size_t) ~ ((size_t)0))
-#define TIFF_TMSIZE_T_MAX (tmsize_t)(TIFF_SIZE_T_MAX >> 1)
-
int TIFFFillStrip(TIFF* tif, uint32 strip);
int TIFFFillTile(TIFF* tif, uint32 tile);
static int TIFFStartStrip(TIFF* tif, uint32 strip);
@@ -49,6 +46,8 @@
#define THRESHOLD_MULTIPLIER 10
#define MAX_THRESHOLD (THRESHOLD_MULTIPLIER * THRESHOLD_MULTIPLIER * THRESHOLD_MULTIPLIER * INITIAL_THRESHOLD)
+#define TIFF_INT64_MAX ((((int64)0x7FFFFFFF) << 32) | 0xFFFFFFFF)
+
/* Read 'size' bytes in tif_rawdata buffer starting at offset 'rawdata_offset'
* Returns 1 in case of success, 0 otherwise. */
static int TIFFReadAndRealloc( TIFF* tif, tmsize_t size,
@@ -734,23 +733,8 @@
return ((tmsize_t)(-1));
}
bytecount = td->td_stripbytecount[strip];
- if ((int64)bytecount <= 0) {
-#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
- TIFFErrorExt(tif->tif_clientdata, module,
- "%I64u: Invalid strip byte count, strip %lu",
- (unsigned __int64) bytecount,
- (unsigned long) strip);
-#else
- TIFFErrorExt(tif->tif_clientdata, module,
- "%llu: Invalid strip byte count, strip %lu",
- (unsigned long long) bytecount,
- (unsigned long) strip);
-#endif
- return ((tmsize_t)(-1));
- }
- bytecountm = (tmsize_t)bytecount;
- if ((uint64)bytecountm!=bytecount) {
- TIFFErrorExt(tif->tif_clientdata, module, "Integer overflow");
+ bytecountm = _TIFFCastUInt64ToSSize(tif, bytecount, module);
+ if (bytecountm == 0) {
return ((tmsize_t)(-1));
}
if (size != (tmsize_t)(-1) && size < bytecountm)
@@ -774,7 +758,7 @@
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
{
uint64 bytecount = td->td_stripbytecount[strip];
- if ((int64)bytecount <= 0) {
+ if( bytecount == 0 || bytecount > (uint64)TIFF_INT64_MAX ) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"Invalid strip byte count %I64u, strip %lu",
@@ -801,7 +785,7 @@
(bytecount - 4096) / 10 > (uint64)stripsize )
{
uint64 newbytecount = (uint64)stripsize * 10 + 4096;
- if( (int64)newbytecount >= 0 )
+ if( newbytecount == 0 || newbytecount > (uint64)TIFF_INT64_MAX )
{
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFWarningExt(tif->tif_clientdata, module,
@@ -1196,10 +1180,8 @@
bytecount64 = td->td_stripbytecount[tile];
if (size != (tmsize_t)(-1) && (uint64)size < bytecount64)
bytecount64 = (uint64)size;
- bytecountm = (tmsize_t)bytecount64;
- if ((uint64)bytecountm!=bytecount64)
- {
- TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
+ bytecountm = _TIFFCastUInt64ToSSize(tif, bytecount64, module);
+ if( bytecountm == 0 ) {
return ((tmsize_t)(-1));
}
return (TIFFReadRawTile1(tif, tile, buf, bytecountm, module));
@@ -1221,7 +1203,7 @@
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
{
uint64 bytecount = td->td_stripbytecount[tile];
- if ((int64)bytecount <= 0) {
+ if( bytecount == 0 || bytecount > (uint64)TIFF_INT64_MAX ) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"%I64u: Invalid tile byte count, tile %lu",
@@ -1248,7 +1230,7 @@
(bytecount - 4096) / 10 > (uint64)stripsize )
{
uint64 newbytecount = (uint64)stripsize * 10 + 4096;
- if( (int64)newbytecount >= 0 )
+ if( newbytecount == 0 || newbytecount > (uint64)TIFF_INT64_MAX )
{
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFWarningExt(tif->tif_clientdata, module,
diff -ru tiff-4.0.10-orig/libtiff/tif_strip.c tiff-4.0.10/libtiff/tif_strip.c
--- tiff-4.0.10-orig/libtiff/tif_strip.c 2017-12-02 16:21:47.947867167 +0100
+++ tiff-4.0.10/libtiff/tif_strip.c 2019-10-02 22:35:17.395184517 +0200
@@ -129,15 +129,8 @@
{
static const char module[] = "TIFFVStripSize";
uint64 m;
- tmsize_t n;
m=TIFFVStripSize64(tif,nrows);
- n=(tmsize_t)m;
- if ((uint64)n!=m)
- {
- TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
- n=0;
- }
- return(n);
+ return _TIFFCastUInt64ToSSize(tif, m, module);
}
/*
@@ -211,15 +204,8 @@
{
static const char module[] = "TIFFStripSize";
uint64 m;
- tmsize_t n;
m=TIFFStripSize64(tif);
- n=(tmsize_t)m;
- if ((uint64)n!=m)
- {
- TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
- n=0;
- }
- return(n);
+ return _TIFFCastUInt64ToSSize(tif, m, module);
}
/*
@@ -330,14 +316,8 @@
{
static const char module[] = "TIFFScanlineSize";
uint64 m;
- tmsize_t n;
m=TIFFScanlineSize64(tif);
- n=(tmsize_t)m;
- if ((uint64)n!=m) {
- TIFFErrorExt(tif->tif_clientdata,module,"Integer arithmetic overflow");
- n=0;
- }
- return(n);
+ return _TIFFCastUInt64ToSSize(tif, m, module);
}
/*
@@ -366,15 +346,8 @@
{
static const char module[] = "TIFFRasterScanlineSize";
uint64 m;
- tmsize_t n;
m=TIFFRasterScanlineSize64(tif);
- n=(tmsize_t)m;
- if ((uint64)n!=m)
- {
- TIFFErrorExt(tif->tif_clientdata,module,"Integer arithmetic overflow");
- n=0;
- }
- return(n);
+ return _TIFFCastUInt64ToSSize(tif, m, module);
}
/* vim: set ts=8 sts=8 sw=8 noet: */
diff -ru tiff-4.0.10-orig/libtiff/tif_tile.c tiff-4.0.10/libtiff/tif_tile.c
--- tiff-4.0.10-orig/libtiff/tif_tile.c 2017-12-02 16:21:47.993972977 +0100
+++ tiff-4.0.10/libtiff/tif_tile.c 2019-10-02 22:35:17.395184517 +0200
@@ -181,15 +181,8 @@
{
static const char module[] = "TIFFTileRowSize";
uint64 m;
- tmsize_t n;
m=TIFFTileRowSize64(tif);
- n=(tmsize_t)m;
- if ((uint64)n!=m)
- {
- TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
- n=0;
- }
- return(n);
+ return _TIFFCastUInt64ToSSize(tif, m, module);
}
/*
@@ -248,15 +241,8 @@
{
static const char module[] = "TIFFVTileSize";
uint64 m;
- tmsize_t n;
m=TIFFVTileSize64(tif,nrows);
- n=(tmsize_t)m;
- if ((uint64)n!=m)
- {
- TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
- n=0;
- }
- return(n);
+ return _TIFFCastUInt64ToSSize(tif, m, module);
}
/*
@@ -272,15 +258,8 @@
{
static const char module[] = "TIFFTileSize";
uint64 m;
- tmsize_t n;
m=TIFFTileSize64(tif);
- n=(tmsize_t)m;
- if ((uint64)n!=m)
- {
- TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
- n=0;
- }
- return(n);
+ return _TIFFCastUInt64ToSSize(tif, m, module);
}
/*
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