File bnc629447_CVE-2010-2806.diff of Package ft2demos

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File bnc629447_CVE-2010-2806.diff of Package ft2demos

From c06da1ad34663da7b6fc39b030dc3ae185b96557 Mon Sep 17 00:00:00 2001
From: Werner Lemberg <wl@gnu.org>
Date: Thu, 05 Aug 2010 21:15:26 +0000
Subject: Fix Savannah bug #30656.

* src/type42/t42parse.c (t42_parse_sfnts): Protect against negative
string_size.
Fix comparison.
---
---
 src/type42/t42parse.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

Index: freetype-2.3.9/src/type42/t42parse.c
===================================================================
--- freetype-2.3.9.orig/src/type42/t42parse.c
+++ freetype-2.3.9/src/type42/t42parse.c
@@ -4,7 +4,7 @@
 /*                                                                         */
 /*    Type 42 font parser (body).                                          */
 /*                                                                         */
-/*  Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by            */
+/*  Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 by      */
 /*  Roberto Alameda.                                                       */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -576,6 +576,12 @@
         }
 
         string_size = T1_ToInt( parser );
+        if ( string_size < 0 )
+        {
+          FT_ERROR(( "t42_parse_sfnts: invalid string size\n" ));
+          error = T42_Err_Invalid_File_Format;
+          goto Fail;
+        }
 
         T1_Skip_PS_Token( parser );             /* `RD' */
         if ( parser->root.error )
@@ -583,13 +589,14 @@
 
         string_buf = parser->root.cursor + 1;   /* one space after `RD' */
 
-        parser->root.cursor += string_size + 1;
-        if ( parser->root.cursor >= limit )
+	if ( limit - parser->root.cursor < string_size )
         {
           FT_ERROR(( "t42_parse_sfnts: too many binary data!\n" ));
           error = T42_Err_Invalid_File_Format;
           goto Fail;
         }
+	else
+ 	  parser->root.cursor += string_size + 1;
       }
 
       if ( !string_buf )

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File bnc629447_CVE-2010-2806.diff of Package ft2demos

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