xpdf/xpdf-3.01-can_2005_3624_5_6_7.patch

--- xpdf-3.01/xpdf/JBIG2Stream.cc.chris-overflows	2005-08-16 23:34:31.000000000 -0600
+++ xpdf-3.01/xpdf/JBIG2Stream.cc	2006-01-03 16:31:21.707918696 -0700
@@ -7,6 +7,7 @@
 //========================================================================
 
 #include <aconf.h>
+#include <limits.h>
 
 #ifdef USE_GCC_PRAGMAS
 #pragma implementation
@@ -681,6 +682,13 @@
   w = wA;
   h = hA;
   line = (wA + 7) >> 3;
+
+  if (h < 0 || line <= 0 || h >= (INT_MAX - 1) / line) {
+    error(-1, "invalid width/height");
+    data = NULL;
+    return;
+  }
+  
   // need to allocate one extra guard byte for use in combine()
   data = (Guchar *)gmalloc(h * line + 1);
   data[h * line] = 0;
@@ -692,6 +700,13 @@
   w = bitmap->w;
   h = bitmap->h;
   line = bitmap->line;
+  
+  if (h < 0 || line <= 0 || h >= (INT_MAX - 1) / line) {
+    error(-1, "invalid width/height");
+    data = NULL;
+    return;
+  }
+  
   // need to allocate one extra guard byte for use in combine()
   data = (Guchar *)gmalloc(h * line + 1);
   memcpy(data, bitmap->data, h * line);
@@ -720,7 +735,10 @@
 }
 
 void JBIG2Bitmap::expand(int newH, Guint pixel) {
-  if (newH <= h) {
+  if (newH <= h || line <= 0 || newH >= (INT_MAX - 1) / line) {
+    error(-1, "invalid width/height");
+    gfree(data);
+    data = NULL;
     return;
   }
   // need to allocate one extra guard byte for use in combine()
@@ -2305,6 +2323,15 @@
     error(getPos(), "Bad symbol dictionary reference in JBIG2 halftone segment");
     return;
   }
+  if (gridH == 0 || gridW >= INT_MAX / gridH) {
+    error(getPos(), "Bad size in JBIG2 halftone segment");
+    return;
+  }
+  if (w == 0 || h >= INT_MAX / w) {
+    error(getPos(), "Bad size in JBIG2 bitmap segment");
+    return;
+  }
+
   patternDict = (JBIG2PatternDict *)seg;
   bpp = 0;
   i = 1;
@@ -2936,6 +2963,11 @@
   JBIG2BitmapPtr tpgrCXPtr0, tpgrCXPtr1, tpgrCXPtr2;
   int x, y, pix;
 
+  if (w < 0 || h <= 0 || w >= INT_MAX / h) {
+    error(-1, "invalid width/height");
+    return NULL;
+  }
+
   bitmap = new JBIG2Bitmap(0, w, h);
   bitmap->clearToZero();
 
--- xpdf-3.01/xpdf/Stream.cc.chris-overflows	2006-01-03 16:16:25.239630341 -0700
+++ xpdf-3.01/xpdf/Stream.cc	2006-01-03 16:44:17.794143711 -0700
@@ -1276,8 +1276,9 @@
   endOfLine = endOfLineA;
   byteAlign = byteAlignA;
   columns = columnsA;
-  if (columns < 1) {
-    columns = 1;
+  if (columns < 1 || columns >= INT_MAX / sizeof(short)) {
+    error(getPos(), "Bad number of columns: %d in CCITTFaxStream", columns);
+    exit(1);
   }
   rows = rowsA;
   endOfBlock = endOfBlockA;
@@ -2920,6 +2921,7 @@
   width = read16();
   numComps = str->getChar();
   if (numComps <= 0 || numComps > 4) {
+    numComps = 0;
     error(getPos(), "Bad number of components in DCT stream", prec);
     return gFalse;
   }
@@ -2950,6 +2952,7 @@
   width = read16();
   numComps = str->getChar();
   if (numComps <= 0 || numComps > 4) {
+    numComps = 0;
     error(getPos(), "Bad number of components in DCT stream", prec);
     return gFalse;
   }
@@ -2976,6 +2979,7 @@
   length = read16() - 2;
   scanInfo.numComps = str->getChar();
   if (scanInfo.numComps <= 0 || scanInfo.numComps > 4) {
+    scanInfo.numComps = 0;
     error(getPos(), "Bad number of components in DCT stream");
     return gFalse;
   }
@@ -3063,12 +3067,12 @@
   while (length > 0) {
     index = str->getChar();
     --length;
-    if ((index & 0x0f) >= 4) {
+    if ((index & ~0x10) >= 4 || (index & ~0x10) < 0) {
       error(getPos(), "Bad DCT Huffman table");
       return gFalse;
     }
     if (index & 0x10) {
-      index &= 0x0f;
+      index &= 0x03;
       if (index >= numACHuffTables)
 	numACHuffTables = index+1;
       tbl = &acHuffTables[index];
@@ -3189,6 +3193,7 @@
     } while (c != 0xff && c != EOF);
     do {
       c = str->getChar();
+      if(c == EOF) return EOF;
     } while (c == 0xff);
   } while (c == 0x00);
   return c;