File bnc619562_CVE-2010-2519.diff of Package ft2demos

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File bnc619562_CVE-2010-2519.diff of Package ft2demos

From 5ef20c8c1d4de12a84b50ba497c2a358c90ec44b Mon Sep 17 00:00:00 2001
From: suzuki toshiya <sssa@flavor1.ipc.hiroshima-u.ac.jp>
Date: Thu, 01 Jul 2010 09:39:04 +0000
Subject: Initial fix for Savannah bug #30306.

* src/base/ftobjs.c (Mac_Read_POST_Resource): Check `rlen'
the length of fragment declared in the POST fragment header
and prevent an underflow in length calculation. Some fonts
set the length to zero in spite of the exist of following
16bit `type'. Reported by Robert Swiecki.
---
diff --git a/src/base/ftobjs.c b/src/base/ftobjs.c
index 9217b87..7c2662f 100644
--- a/src/base/ftobjs.c
+++ b/src/base/ftobjs.c
@@ -1547,7 +1547,16 @@
         goto Exit;
       if ( FT_READ_USHORT( flags ) )
         goto Exit;
-      rlen -= 2;                    /* the flags are part of the resource */
+      FT_TRACE3(( "POST fragment[%d]: offsets=0x%08x, rlen=0x%08x, flags=0x%04x\n",
+                   i, offsets[i], rlen, flags ));
+
+      /* the flags are part of the resource, so rlen >= 2.  */
+      /* but some fonts declare rlen = 0 for empty fragment */
+      if ( rlen > 2 )
+        rlen -= 2;
+      else
+        rlen = 0;
+
       if ( ( flags >> 8 ) == type )
         len += rlen;
       else
--
cgit v0.8.3.2
From b2ea64bcc6c385a8e8318f9c759450a07df58b6d Mon Sep 17 00:00:00 2001
From: suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Date: Fri, 02 Jul 2010 09:16:02 +0000
Subject: Additional fix for Savannah bug #30306.

* src/base/ftobjs.c (Mac_Read_POST_Resource): If the type
of the POST fragment is 0, the segment is completely ignored.
The declared length of the segment is not cared at all.
According to Adobe Technical Note 5040, type 0 segment is
comment only and should not be loaded for the interpreter.
Reported by Robert Swiecki.
---
diff --git a/src/base/ftobjs.c b/src/base/ftobjs.c
index 7c2662f..11efc75 100644
--- a/src/base/ftobjs.c
+++ b/src/base/ftobjs.c
@@ -1550,6 +1550,9 @@
       FT_TRACE3(( "POST fragment[%d]: offsets=0x%08x, rlen=0x%08x, flags=0x%04x\n",
                    i, offsets[i], rlen, flags ));
 
+      if ( ( flags >> 8 ) == 0 )        /* Comment, should not be loaded */
+        continue;
+
       /* the flags are part of the resource, so rlen >= 2.  */
       /* but some fonts declare rlen = 0 for empty fragment */
       if ( rlen > 2 )
--
cgit v0.8.3.2

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File bnc619562_CVE-2010-2519.diff of Package ft2demos

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