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qtdemux: check some more atom sizes prior to parsing

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This commit is contained in:
Mark Nauwelaerts 2009-10-15 11:52:35 +02:00
parent 6725c91387
commit 354a062c89
1 changed files with 55 additions and 5 deletions
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60
gst/qtdemux/qtdemux.c
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@ -4341,13 +4341,18 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
goto corrupt_file;
}
len = QT_UINT32 ((guint8 *) mdhd->data);
version = QT_UINT32 ((guint8 *) mdhd->data + 8);
GST_LOG_OBJECT (qtdemux, "track version/flags: %08x", version);
if (version == 0x01000000) {
if (len < 38)
goto corrupt_file;
stream->timescale = QT_UINT32 ((guint8 *) mdhd->data + 28);
stream->duration = QT_UINT64 ((guint8 *) mdhd->data + 32);
stream->lang_code = QT_UINT16 ((guint8 *) mdhd->data + 36);
} else {
if (len < 30)
goto corrupt_file;
stream->timescale = QT_UINT32 ((guint8 *) mdhd->data + 20);
stream->duration = QT_UINT32 ((guint8 *) mdhd->data + 24);
stream->lang_code = QT_UINT16 ((guint8 *) mdhd->data + 28);
@ -4397,7 +4402,9 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
GST_LOG_OBJECT (qtdemux, "track type: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (QT_FOURCC ((guint8 *) hdlr->data + 12)));
stream->subtype = QT_FOURCC ((guint8 *) hdlr->data + 16);
len = QT_UINT32 ((guint8 *) hdlr->data);
if (len >= 20)
stream->subtype = QT_FOURCC ((guint8 *) hdlr->data + 16);
GST_LOG_OBJECT (qtdemux, "track subtype: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (stream->subtype));
@ -5090,6 +5097,11 @@ qtdemux_tag_add_location (GstQTDemux * qtdemux, const char *tag,
char *name;
gchar *data;
gdouble longitude, latitude, altitude;
gint len;
len = QT_UINT32 (node->data);
if (len <= 14)
goto short_read;
data = node->data;
offset = 14;
@ -5111,6 +5123,9 @@ qtdemux_tag_add_location (GstQTDemux * qtdemux, const char *tag,
g_free (name);
}
if (len <= offset + 2 + 4 + 4 + 4)
goto short_read;
/* +1 +1 = skip null-terminator and location role byte */
offset += 1 + 1;
longitude = QT_FP32 (data + offset);
@ -5131,6 +5146,15 @@ qtdemux_tag_add_location (GstQTDemux * qtdemux, const char *tag,
}
/* TODO: no GST_TAG_, so astronomical body and additional notes skipped */
return;
/* ERRORS */
short_read:
{
GST_DEBUG_OBJECT (qtdemux, "short read parsing 3GP location");
return;
}
}
@ -5140,6 +5164,11 @@ qtdemux_tag_add_year (GstQTDemux * qtdemux, const char *tag, const char *dummy,
{
guint16 y;
GDate *date;
gint len;
len = QT_UINT32 (node->data);
if (len < 14)
return;
y = QT_UINT16 ((guint8 *) node->data + 12);
GST_DEBUG_OBJECT (qtdemux, "year: %u", y);
@ -5157,7 +5186,11 @@ qtdemux_tag_add_classification (GstQTDemux * qtdemux, const char *tag,
char *tag_str = NULL;
guint8 *entity;
guint16 table;
gint len;
len = QT_UINT32 (node->data);
if (len <= 20)
goto short_read;
offset = 12;
entity = (guint8 *) node->data + offset;
@ -5184,6 +5217,15 @@ qtdemux_tag_add_classification (GstQTDemux * qtdemux, const char *tag,
tag_str, NULL);
g_free (tag_str);
return;
/* ERRORS */
short_read:
{
GST_DEBUG_OBJECT (qtdemux, "short read parsing 3GP classification");
return;
}
}
static gboolean
@ -5202,7 +5244,7 @@ qtdemux_tag_add_str_full (GstQTDemux * qtdemux, const char *tag,
if (data) {
len = QT_UINT32 (data->data);
type = QT_UINT32 ((guint8 *) data->data + 8);
if (type == 0x00000001) {
if (type == 0x00000001 && len > 16) {
s = gst_tag_freeform_string_to_utf8 ((char *) data->data + 16, len - 16,
env_vars);
if (s) {
@ -5437,7 +5479,7 @@ qtdemux_tag_add_date (GstQTDemux * qtdemux, const char *tag, const char *dummy,
if (data) {
len = QT_UINT32 (data->data);
type = QT_UINT32 ((guint8 *) data->data + 8);
if (type == 0x00000001) {
if (type == 0x00000001 && len > 16) {
guint y, m = 1, d = 1;
gint ret;
@ -5620,8 +5662,16 @@ qtdemux_parse_udta (GstQTDemux * qtdemux, GNode * udta)
for (i = 0; i < G_N_ELEMENTS (add_funcs); ++i) {
node = qtdemux_tree_get_child_by_type (ilst, add_funcs[i].fourcc);
if (node) {
add_funcs[i].func (qtdemux, add_funcs[i].gst_tag,
add_funcs[i].gst_tag_bis, node);
gint len;
len = QT_UINT32 (node->data);
if (len < 12) {
GST_DEBUG_OBJECT (qtdemux, "too small tag atom %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (add_funcs[i].fourcc));
} else {
add_funcs[i].func (qtdemux, add_funcs[i].gst_tag,
add_funcs[i].gst_tag_bis, node);
}
g_node_destroy (node);
}
}