Package: gst-plugins-good1.0 / 1.4.4-2+deb8u3

0002-avidemux-Fix-various-out-of-bounds-reads-when-parsin.patch Patch series | download
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From 32d9f3c158b58984be7731434df619131c0736f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Fri, 20 Jan 2017 07:58:26 +0200
Subject: [PATCH] avidemux: Fix various out of bounds reads when parsing ncdt
 tags

https://bugzilla.gnome.org/show_bug.cgi?id=777500
---
 gst/avi/gstavidemux.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

Index: gst-plugins-good1.0-1.4.4/gst/avi/gstavidemux.c
===================================================================
--- gst-plugins-good1.0-1.4.4.orig/gst/avi/gstavidemux.c
+++ gst-plugins-good1.0-1.4.4/gst/avi/gstavidemux.c
@@ -3890,6 +3890,7 @@ gst_avi_demux_parse_ncdt (GstAviDemux *
 
           tsize -= 4;
           ptr += 4;
+          left -= 4;
 
           GST_DEBUG_OBJECT (avi, "sub-tag %u, size %u", sub_tag, sub_size);
           /* http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html#NCTG
@@ -3908,10 +3909,12 @@ gst_avi_demux_parse_ncdt (GstAviDemux *
               break;
             case 0x13:         /* CreationDate */
               type = GST_TAG_DATE_TIME;
-              if (ptr[4] == ':')
-                ptr[4] = '-';
-              if (ptr[7] == ':')
-                ptr[7] = '-';
+              if (left > 7) {
+                if (ptr[4] == ':')
+                  ptr[4] = '-';
+                if (ptr[7] == ':')
+                  ptr[7] = '-';
+              }
               break;
             default:
               type = NULL;
@@ -3925,6 +3928,7 @@ gst_avi_demux_parse_ncdt (GstAviDemux *
 
           ptr += sub_size;
           tsize -= sub_size;
+          left -= sub_size;
         }
         break;
       default: