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Bug#342292: tetex-bin: Multiple exploitable heap overflows in embedded xpdf copy



Frank Küster wrote:
> I'm currently preparing an upload of tetex-bin linked against libpoppler.

I'm attaching the current patch against the version in sarge.  Please
let me know which version in sid fixes these problems.

The corresponding CVE names are:

CVE IDs        : CAN-2005-3191 CAN-2005-3192 CVE-2005-3624 CVE-2005-3625
                 CVE-2005-3626 CVE-2005-3627 CVE-2005-3628


Regards,

	Joey

-- 
Never trust an operating system you don't have source for!

Please always Cc to me when replying to me on the lists.
diff -u tetex-bin-2.0.2/debian/changelog tetex-bin-2.0.2/debian/changelog
--- tetex-bin-2.0.2/debian/changelog
+++ tetex-bin-2.0.2/debian/changelog
@@ -1,3 +1,35 @@
+tetex-bin (2.0.2-30sarge4) stable-security; urgency=high
+
+  * Non-maintainer upload by the Security Team
+  * Added more precautionary checks by Dirk Müller [xpdf/Stream.cc,
+    xpdf/JBIG2Stream.cc, debian/patches/patch-CVE-2005-3191]
+
+ -- Martin Schulze <joey@infodrom.org>  Thu, 15 Dec 2005 17:02:52 +0100
+
+tetex-bin (2.0.2-30sarge3) stable-security; urgency=high
+
+  * Non-maintainer upload by the Security Team
+  * Added more precautionary checks by Martin Pitt
+
+ -- Martin Schulze <joey@infodrom.org>  Mon, 12 Dec 2005 08:32:05 +0100
+
+tetex-bin (2.0.2-30sarge2) stable-security; urgency=high
+
+  * Non-maintainer upload by the Security Team
+  * Adjusted the former patch
+  * Applied missing bits found by Ludwig Nussel
+
+ -- Martin Schulze <joey@infodrom.org>  Fri,  9 Dec 2005 11:25:16 +0100
+
+tetex-bin (2.0.2-30sarge1) stable-security; urgency=high
+
+  * Non-maintainer upload by the Security Team
+  * Partially applied patch from xpdf upstream to fix buffer overflows
+    [libs/xpdf/xpdf/Stream.cc, libs/xpdf/xpdf/Stream.h, CAN-2005-3191,
+    debian/patches/patch-CVE-2005-3191]
+
+ -- Martin Schulze <joey@infodrom.org>  Thu,  8 Dec 2005 10:19:45 +0100
+
 tetex-bin (2.0.2-30) unstable; urgency=low
 
   * Restore debian/watch and don't keep the recovered control file in
diff -u tetex-bin-2.0.2/debian/rules tetex-bin-2.0.2/debian/rules
--- tetex-bin-2.0.2/debian/rules
+++ tetex-bin-2.0.2/debian/rules
@@ -57,6 +57,8 @@
 	patch -p1 -Ni debian/patches/patch-CAN-2005-0064
 	patch -p1 -NRi debian/patches/patch-mandash || true
 	patch -p1 -Ni debian/patches/patch-mandash
+	patch -p1 -NRi debian/patches/patch-CVE-2005-3191 || true
+	patch -p1 -Ni debian/patches/patch-CVE-2005-3191
 	cp -f /usr/share/misc/config.guess /usr/share/misc/config.sub ./texk/
 	cp -f /usr/share/misc/config.guess /usr/share/misc/config.sub ./utils/texinfo/
 	cp -f /usr/share/misc/config.guess /usr/share/misc/config.sub ./config/
@@ -95,6 +97,7 @@
 	# Add here commands to clean up after the build process.
 	# Make sure all of our expected symlinks are in place
 	sh debian/restore-symlinks
+	patch -p1 -NRi debian/patches/patch-CVE-2005-3191 || true
 	patch -p1 -NRi debian/patches/patch-mandash || true
 	patch -p1 -NRi debian/patches/patch-CAN-2005-0064 || true
 	patch -p1 -NRi debian/patches/patch-CAN-2004-1125 || true
only in patch2:
unchanged:
--- tetex-bin-2.0.2.orig/debian/patches/patch-CVE-2005-3191
+++ tetex-bin-2.0.2/debian/patches/patch-CVE-2005-3191
@@ -0,0 +1,243 @@
+diff -u -p -Nr --exclude CVS tetex-bin-2.0.2.orig/libs/xpdf/xpdf/JBIG2Stream.cc tetex-bin-2.0.2/libs/xpdf/xpdf/JBIG2Stream.cc
+--- tetex-bin-2.0.2.orig/libs/xpdf/xpdf/JBIG2Stream.cc	2002-11-16 16:02:19.000000000 +0100
++++ tetex-bin-2.0.2/libs/xpdf/xpdf/JBIG2Stream.cc	2005-12-15 16:51:31.000000000 +0100
+@@ -13,6 +13,7 @@
+ #endif
+ 
+ #include <stdlib.h>
++#include <limits.h>
+ #include "GList.h"
+ #include "Error.h"
+ #include "JBIG2Stream.h"
+@@ -977,7 +978,14 @@ JBIG2Bitmap::JBIG2Bitmap(Guint segNumA, 
+   w = wA;
+   h = hA;
+   line = (wA + 7) >> 3;
+-  data = (Guchar *)gmalloc(h * line);
++
++  if (h < 0 || line <= 0 || h >= (INT_MAX-1) / line)
++    data = NULL;
++  else {
++    // need to allocate one extra guard byte for use in combine()
++    data = (Guchar *)gmalloc(h * line + 1);
++    data[h * line] = 0;
++  }
+ }
+ 
+ JBIG2Bitmap::JBIG2Bitmap(Guint segNumA, JBIG2Bitmap *bitmap):
+@@ -986,8 +994,15 @@ JBIG2Bitmap::JBIG2Bitmap(Guint segNumA, 
+   w = bitmap->w;
+   h = bitmap->h;
+   line = bitmap->line;
+-  data = (Guchar *)gmalloc(h * line);
++
++  if (h < 0 || line <= 0 || h >= (INT_MAX-1) / line) {
++    data = NULL;
++    return;
++  }
++
++  data = (Guchar *)gmalloc(h * line + 1);
+   memcpy(data, bitmap->data, h * line);
++  data[h * line] = 0;
+ }
+ 
+ JBIG2Bitmap::~JBIG2Bitmap() {
+@@ -1012,10 +1027,10 @@ JBIG2Bitmap *JBIG2Bitmap::getSlice(Guint
+ }
+ 
+ void JBIG2Bitmap::expand(int newH, Guint pixel) {
+-  if (newH <= h) {
++  if (newH <= h || line <= 0 || newH >= (INT_MAX-1) / line) {
+     return;
+   }
+-  data = (Guchar *)grealloc(data, newH * line);
++  data = (Guchar *)grealloc(data, newH * line + 1);
+   if (pixel) {
+     memset(data + h * line, 0xff, (newH - h) * line);
+   } else {
+@@ -2505,6 +2520,16 @@ void JBIG2Stream::readHalftoneRegionSeg(
+     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;
+@@ -3078,6 +3103,9 @@ JBIG2Bitmap *JBIG2Stream::readGenericRef
+   Guint ltpCX, cx, cx0, cx2, cx3, cx4, tpgrCX0, tpgrCX1, tpgrCX2;
+   int x, y, pix;
+ 
++  if (w < 0 || h <= 0 || w >= INT_MAX / h)
++    return NULL;
++
+   bitmap = new JBIG2Bitmap(0, w, h);
+   bitmap->clearToZero();
+ 
+diff -u -p -Nr --exclude CVS tetex-bin-2.0.2.orig/libs/xpdf/xpdf/Stream.cc tetex-bin-2.0.2/libs/xpdf/xpdf/Stream.cc
+--- tetex-bin-2.0.2.orig/libs/xpdf/xpdf/Stream.cc	2005-12-15 16:44:06.000000000 +0100
++++ tetex-bin-2.0.2/libs/xpdf/xpdf/Stream.cc	2005-12-15 17:02:31.000000000 +0100
+@@ -15,6 +15,7 @@
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <stddef.h>
++#include <limits.h>
+ #ifndef WIN32
+ #include <unistd.h>
+ #endif
+@@ -404,18 +405,40 @@ 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;
+ 
++  if (width <= 0 || nComps <= 0 || nBits <= 0 ||
++      nComps >= INT_MAX/nBits ||
++      width >= INT_MAX/nComps/nBits) {
++    return;
++  }
+   nVals = width * nComps;
++  if (nVals + 7 <= 0) {
++    return;
++  }
++  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() {
+@@ -981,6 +1004,10 @@ 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;
+   }
+@@ -1226,6 +1253,12 @@ CCITTFaxStream::CCITTFaxStream(Stream *s
+   endOfLine = endOfLineA;
+   byteAlign = byteAlignA;
+   columns = columnsA;
++
++  if (columns + 4 < 1 || (columns + 4) >= INT_MAX / sizeof(short)) {
++    error(getPos(), "Bad number of columns in CCITTFaxStream");
++    exit(1);
++  }
++
+   rows = rowsA;
+   endOfBlock = endOfBlockA;
+   black = blackA;
+@@ -2860,6 +2893,11 @@ GBool DCTStream::readBaselineSOF() {
+   height = read16();
+   width = read16();
+   numComps = str->getChar();
++  if (numComps <= 0 || numComps > 4) {
++    numComps = 0;
++    error(getPos(), "Bad number of components in DCT stream", prec);
++    return gFalse;
++  }
+   if (prec != 8) {
+     error(getPos(), "Bad DCT precision %d", prec);
+     return gFalse;
+@@ -2886,6 +2924,11 @@ GBool DCTStream::readProgressiveSOF() {
+   height = read16();
+   width = read16();
+   numComps = str->getChar();
++  if (numComps <= 0 || numComps > 4) {
++    numComps = 0;
++    error(getPos(), "Bad number of components in DCT stream");
++    return gFalse;
++  }
+   if (prec != 8) {
+     error(getPos(), "Bad DCT precision %d", prec);
+     return gFalse;
+@@ -2908,6 +2951,11 @@ GBool DCTStream::readScanInfo() {
+ 
+   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;
++  }
+   --length;
+   if (length != 2 * scanInfo.numComps + 3) {
+     error(getPos(), "Bad DCT scan info block");
+@@ -2975,12 +3023,12 @@ GBool DCTStream::readHuffmanTables() {
+   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];
+@@ -3178,6 +3226,10 @@ 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;
+   }
+diff -u -p -Nr --exclude CVS tetex-bin-2.0.2.orig/libs/xpdf/xpdf/Stream.h tetex-bin-2.0.2/libs/xpdf/xpdf/Stream.h
+--- tetex-bin-2.0.2.orig/libs/xpdf/xpdf/Stream.h	2005-12-15 16:44:06.000000000 +0100
++++ tetex-bin-2.0.2/libs/xpdf/xpdf/Stream.h	2005-12-15 16:44:00.000000000 +0100
+@@ -225,6 +225,8 @@ public:
+ 
+   ~StreamPredictor();
+ 
++  GBool isOk() { return ok; }
++
+   int lookChar();
+   int getChar();
+ 
+@@ -242,6 +244,7 @@ private:
+   int rowBytes;			// bytes per line
+   Guchar *predLine;		// line buffer
+   int predIdx;			// current index in predLine
++  GBool ok;
+ };
+ 
+ //------------------------------------------------------------------------

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