Patch security issues in imported xpdf code.

Security: CAN-2005-3193
Security: http://www.kde.org/info/security/advisory-20051207-1.txt
Security: kpdf, the KDE pdf viewer and KOffice' pdf filter share code with
	  xpdf. xpdf contains multiple integer overflow vulnerabilities that
	  allow specially crafted pdf files, when opened, to overflow a heap
	  allocated buffer and execute arbitrary code.

1 files changed, 92 insertions, 0 deletions

diff --git a/editors/calligra/files/patch-post-1.3-koffice-CAN-2005-3193 b/editors/calligra/files/patch-post-1.3-koffice-CAN-2005-3193
new file mode 100644
index 000000000000..69cb714d18af
--- /dev/null
+++ b/editors/calligra/files/patch-post-1.3-koffice-CAN-2005-3193
@@ -0,0 +1,92 @@
+Index: filters/kword/pdf/xpdf/xpdf/Stream.cc
+===================================================================
+--- filters/kword/pdf/xpdf/xpdf/Stream.cc	(revision 485850)
++++ filters/kword/pdf/xpdf/xpdf/Stream.cc	(revision 486431)
+@@ -404,18 +404,33 @@ void ImageStream::skipLine() {
+ 
+ StreamPredictor::StreamPredictor(Stream *strA, int predictorA,
+ 				 int widthA, int nCompsA, int nBitsA) {
++  int totalBits;
++
+   str = strA;
+   predictor = predictorA;
+   width = widthA;
+   nComps = nCompsA;
+   nBits = nBitsA;
++  predLine = NULL;
++  ok = gFalse;
+ 
+   nVals = width * nComps;
++  totalBits = nVals * nBits;
++  if ( totalBits == 0 ||
++     (totalBits / nBits) / nComps != width ||
++     totalBits + 7 < 0) {
++    return;
++  }
+   pixBytes = (nComps * nBits + 7) >> 3;
+-  rowBytes = ((nVals * nBits + 7) >> 3) + pixBytes;
++  rowBytes = ((totalBits + 7) >> 3) + pixBytes;
++  if (rowBytes < 0)
++    return;
++
+   predLine = (Guchar *)gmalloc(rowBytes);
+   memset(predLine, 0, rowBytes);
+   predIdx = rowBytes;
++
++  ok = gTrue;
+ }
+ 
+ StreamPredictor::~StreamPredictor() {
+@@ -982,6 +997,10 @@ LZWStream::LZWStream(Stream *strA, int p
+     FilterStream(strA) {
+   if (predictor != 1) {
+     pred = new StreamPredictor(this, predictor, columns, colors, bits);
++    if ( !pred->isOk()) {
++       delete pred;
++       pred = NULL;
++    }
+   } else {
+     pred = NULL;
+   }
+@@ -2861,6 +2880,10 @@ GBool DCTStream::readBaselineSOF() {
+   height = read16();
+   width = read16();
+   numComps = str->getChar();
++  if (numComps <= 0 || numComps > 4) {
++     error(getPos(), "Bad number of components in DCT stream");
++     return gFalse;
++  }
+   if (prec != 8) {
+     error(getPos(), "Bad DCT precision %d", prec);
+     return gFalse;
+@@ -3179,6 +3202,10 @@ FlateStream::FlateStream(Stream *strA, i
+     FilterStream(strA) {
+   if (predictor != 1) {
+     pred = new StreamPredictor(this, predictor, columns, colors, bits);
++    if ( !pred->isOk()) {
++        delete pred;
++        pred = NULL;
++    }
+   } else {
+     pred = NULL;
+   }
+Index: filters/kword/pdf/xpdf/xpdf/Stream.h
+===================================================================
+--- filters/kword/pdf/xpdf/xpdf/Stream.h	(revision 485850)
++++ filters/kword/pdf/xpdf/xpdf/Stream.h	(revision 486431)
+@@ -227,6 +227,7 @@ public:
+ 
+   int lookChar();
+   int getChar();
++  GBool isOk() { return ok; }
+ 
+ private:
+ 
+@@ -242,6 +243,7 @@ private:
+   int rowBytes;			// bytes per line
+   Guchar *predLine;		// line buffer
+   int predIdx;			// current index in predLine
++  GBool ok;
+ };
+ 
+ //------------------------------------------------------------------------