$OpenBSD: patch-modules_demux_mkv_demux_cpp,v 1.2 2011/04/12 22:40:20 sthen Exp $

Insufficient input validation in MKV demuxer. CVE-2011-0531

--- modules/demux/mkv/demux.cpp.orig	Tue Feb  1 20:03:12 2011
+++ modules/demux/mkv/demux.cpp	Tue Feb  1 20:03:46 2011
@@ -94,7 +94,7 @@ matroska_stream_c *demux_sys_t::AnalyseAllSegmentsFoun
 
     while (p_l0 != 0)
     {
-        if (EbmlId(*p_l0) == KaxSegment::ClassInfos.GlobalId)
+        if ( MKV_IS_ID( p_l0, KaxSegment) )
         {
             EbmlParser  *ep;
             matroska_segment_c *p_segment1 = new matroska_segment_c( *this, *p_estream );