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Auto sync2gitlab import of gstreamer1-plugins-good-1.16.1-3.el8.src.rpm

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CentOS Sources 2022-07-17 00:12:32 +00:00
parent 8c4858f968
commit add4c47e60
3 changed files with 249 additions and 1 deletions
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201
9efd93e20dd7789e4172ad6c8f4108271b3fb1ee.patch Normal file
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@ -0,0 +1,201 @@
From 9efd93e20dd7789e4172ad6c8f4108271b3fb1ee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Thu, 4 Mar 2021 13:05:19 +0200
Subject: [PATCH] matroskademux: Fix extraction of multichannel WavPack
The old code had a couple of issues that all lead to potential memory
safety bugs.
- Use a constant for the Wavpack4Header size instead of using sizeof.
It's written out into the data and not from the struct and who knows
what special alignment/padding requirements some C compilers have.
- gst_buffer_set_size() does not realloc the buffer when setting a
bigger size than allocated, it only allows growing up to the maximum
allocated size. Instead use a GstAdapter to collect all the blocks
and take out everything at once in the end.
- Check that enough data is actually available in the input and
otherwise handle it an error in all cases instead of silently
ignoring it.
Among other things this fixes out of bounds writes because the code
assumed gst_buffer_set_size() can grow the buffer and simply wrote after
the end of the buffer.
Thanks to Natalie Silvanovich for reporting.
Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/859
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/904>
---
gst/matroska/matroska-demux.c | 99 +++++++++++++++++++----------------
gst/matroska/matroska-ids.h | 2 +
2 files changed, 55 insertions(+), 46 deletions(-)
diff --git a/gst/matroska/matroska-demux.c b/gst/matroska/matroska-demux.c
index 4eb3d2a9f..f890ae611 100644
--- a/gst/matroska/matroska-demux.c
+++ b/gst/matroska/matroska-demux.c
@@ -3706,6 +3706,12 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
guint32 block_samples, tmp;
gsize size = gst_buffer_get_size (*buf);
+ if (size < 4) {
+ GST_ERROR_OBJECT (element, "Too small wavpack buffer");
+ gst_buffer_unmap (*buf, &map);
+ return GST_FLOW_ERROR;
+ }
+
gst_buffer_extract (*buf, 0, &tmp, sizeof (guint32));
block_samples = GUINT32_FROM_LE (tmp);
/* we need to reconstruct the header of the wavpack block */
@@ -3713,10 +3719,10 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
/* -20 because ck_size is the size of the wavpack block -8
* and lace_size is the size of the wavpack block + 12
* (the three guint32 of the header that already are in the buffer) */
- wvh.ck_size = size + sizeof (Wavpack4Header) - 20;
+ wvh.ck_size = size + WAVPACK4_HEADER_SIZE - 20;
/* block_samples, flags and crc are already in the buffer */
- newbuf = gst_buffer_new_allocate (NULL, sizeof (Wavpack4Header) - 12, NULL);
+ newbuf = gst_buffer_new_allocate (NULL, WAVPACK4_HEADER_SIZE - 12, NULL);
gst_buffer_map (newbuf, &outmap, GST_MAP_WRITE);
data = outmap.data;
@@ -3741,9 +3747,11 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
audiocontext->wvpk_block_index += block_samples;
} else {
guint8 *outdata = NULL;
- guint outpos = 0;
- gsize buf_size, size, out_size = 0;
+ gsize buf_size, size;
guint32 block_samples, flags, crc, blocksize;
+ GstAdapter *adapter;
+
+ adapter = gst_adapter_new ();
gst_buffer_map (*buf, &map, GST_MAP_READ);
buf_data = map.data;
@@ -3752,6 +3760,7 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
if (buf_size < 4) {
GST_ERROR_OBJECT (element, "Too small wavpack buffer");
gst_buffer_unmap (*buf, &map);
+ g_object_unref (adapter);
return GST_FLOW_ERROR;
}
@@ -3773,59 +3782,57 @@ gst_matroska_demux_add_wvpk_header (GstElement * element,
data += 4;
size -= 4;
- if (blocksize == 0 || size < blocksize)
- break;
-
- g_assert ((newbuf == NULL) == (outdata == NULL));
+ if (blocksize == 0 || size < blocksize) {
+ GST_ERROR_OBJECT (element, "Too small wavpack buffer");
+ gst_buffer_unmap (*buf, &map);
+ g_object_unref (adapter);
+ return GST_FLOW_ERROR;
+ }
- if (newbuf == NULL) {
- out_size = sizeof (Wavpack4Header) + blocksize;
- newbuf = gst_buffer_new_allocate (NULL, out_size, NULL);
+ g_assert (newbuf == NULL);
- gst_buffer_copy_into (newbuf, *buf,
- GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_FLAGS, 0, -1);
+ newbuf =
+ gst_buffer_new_allocate (NULL, WAVPACK4_HEADER_SIZE + blocksize,
+ NULL);
+ gst_buffer_map (newbuf, &outmap, GST_MAP_WRITE);
+ outdata = outmap.data;
+
+ outdata[0] = 'w';
+ outdata[1] = 'v';
+ outdata[2] = 'p';
+ outdata[3] = 'k';
+ outdata += 4;
+
+ GST_WRITE_UINT32_LE (outdata, blocksize + WAVPACK4_HEADER_SIZE - 8);
+ GST_WRITE_UINT16_LE (outdata + 4, wvh.version);
+ GST_WRITE_UINT8 (outdata + 6, wvh.track_no);
+ GST_WRITE_UINT8 (outdata + 7, wvh.index_no);
+ GST_WRITE_UINT32_LE (outdata + 8, wvh.total_samples);
+ GST_WRITE_UINT32_LE (outdata + 12, wvh.block_index);
+ GST_WRITE_UINT32_LE (outdata + 16, block_samples);
+ GST_WRITE_UINT32_LE (outdata + 20, flags);
+ GST_WRITE_UINT32_LE (outdata + 24, crc);
+ outdata += 28;
+
+ memcpy (outdata, data, blocksize);
- outpos = 0;
- gst_buffer_map (newbuf, &outmap, GST_MAP_WRITE);
- outdata = outmap.data;
- } else {
- gst_buffer_unmap (newbuf, &outmap);
- out_size += sizeof (Wavpack4Header) + blocksize;
- gst_buffer_set_size (newbuf, out_size);
- gst_buffer_map (newbuf, &outmap, GST_MAP_WRITE);
- outdata = outmap.data;
- }
+ gst_buffer_unmap (newbuf, &outmap);
+ gst_adapter_push (adapter, newbuf);
+ newbuf = NULL;
- outdata[outpos] = 'w';
- outdata[outpos + 1] = 'v';
- outdata[outpos + 2] = 'p';
- outdata[outpos + 3] = 'k';
- outpos += 4;
-
- GST_WRITE_UINT32_LE (outdata + outpos,
- blocksize + sizeof (Wavpack4Header) - 8);
- GST_WRITE_UINT16_LE (outdata + outpos + 4, wvh.version);
- GST_WRITE_UINT8 (outdata + outpos + 6, wvh.track_no);
- GST_WRITE_UINT8 (outdata + outpos + 7, wvh.index_no);
- GST_WRITE_UINT32_LE (outdata + outpos + 8, wvh.total_samples);
- GST_WRITE_UINT32_LE (outdata + outpos + 12, wvh.block_index);
- GST_WRITE_UINT32_LE (outdata + outpos + 16, block_samples);
- GST_WRITE_UINT32_LE (outdata + outpos + 20, flags);
- GST_WRITE_UINT32_LE (outdata + outpos + 24, crc);
- outpos += 28;
-
- memmove (outdata + outpos, data, blocksize);
- outpos += blocksize;
data += blocksize;
size -= blocksize;
}
gst_buffer_unmap (*buf, &map);
- gst_buffer_unref (*buf);
- if (newbuf)
- gst_buffer_unmap (newbuf, &outmap);
+ newbuf = gst_adapter_take_buffer (adapter, gst_adapter_available (adapter));
+ g_object_unref (adapter);
+ gst_buffer_copy_into (newbuf, *buf,
+ GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_FLAGS, 0, -1);
+ gst_buffer_unref (*buf);
*buf = newbuf;
+
audiocontext->wvpk_block_index += block_samples;
}
diff --git a/gst/matroska/matroska-ids.h b/gst/matroska/matroska-ids.h
index 9b263d8a1..a0d68343f 100644
--- a/gst/matroska/matroska-ids.h
+++ b/gst/matroska/matroska-ids.h
@@ -667,6 +667,8 @@ typedef struct _Wavpack4Header {
guint32 crc; /* crc for actual decoded data */
} Wavpack4Header;
+#define WAVPACK4_HEADER_SIZE (32)
+
typedef enum {
GST_MATROSKA_TRACK_ENCODING_SCOPE_FRAME = (1<<0),
GST_MATROSKA_TRACK_ENCODING_SCOPE_CODEC_DATA = (1<<1),
--
GitLab

38
d62cecf193d6bf3b16fe91d725f4514161f602c3.patch Normal file
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@ -0,0 +1,38 @@
From d62cecf193d6bf3b16fe91d725f4514161f602c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Wed, 3 Mar 2021 11:31:52 +0200
Subject: [PATCH] matroskademux: Initialize track context out parameter to NULL
before parsing
Various error return paths don't set it to NULL and callers are only
checking if the pointer is NULL. As it's allocated on the stack this
usually contains random stack memory, and more often than not the memory
of a previously parsed track.
This then causes all kinds of memory corruptions further down the line.
Thanks to Natalie Silvanovich for reporting.
Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/858
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/904>
---
gst/matroska/matroska-demux.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gst/matroska/matroska-demux.c b/gst/matroska/matroska-demux.c
index b2cd9b5d4..4eb3d2a9f 100644
--- a/gst/matroska/matroska-demux.c
+++ b/gst/matroska/matroska-demux.c
@@ -660,6 +660,8 @@ gst_matroska_demux_parse_stream (GstMatroskaDemux * demux, GstEbmlRead * ebml,
DEBUG_ELEMENT_START (demux, ebml, "TrackEntry");
+ *dest_context = NULL;
+
/* start with the master */
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (demux, ebml, "TrackEntry", ret);
--
GitLab

11
gstreamer1-plugins-good.spec
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@ -15,7 +15,7 @@
Name: gstreamer1-plugins-good
Version: 1.16.1
Release: 2%{?gitcommit:.git%{shortcommit}}%{?dist}
Release: 3%{?gitcommit:.git%{shortcommit}}%{?dist}
Summary: GStreamer plugins with good code and licensing
License: LGPLv2+
@ -29,6 +29,9 @@ Source0: gst-plugins-good-%{version}.tar.xz
Source0: http://gstreamer.freedesktop.org/src/gst-plugins-good/gst-plugins-good-%{version}.tar.xz
%endif
Patch0: d62cecf193d6bf3b16fe91d725f4514161f602c3.patch
Patch1: 9efd93e20dd7789e4172ad6c8f4108271b3fb1ee.patch
BuildRequires: gcc
BuildRequires: gcc-c++
BuildRequires: gstreamer1-devel >= %{version}
@ -161,6 +164,8 @@ to be installed.
%prep
%setup -q -n gst-plugins-good-%{version}
%patch0 -p1
%patch1 -p1
%build
%configure --disable-silent-rules --disable-fatal-warnings \
@ -345,6 +350,10 @@ find $RPM_BUILD_ROOT -name '*.la' -exec rm -f {} ';'
%changelog
* Thu Jul 14 2022 Wim Taymans <wtaymans@redhat.com> - 1.16.1-3
- Add patches for matroskademux. CVE-2021-3497
- Resolves: rhbz#1948942
* Wed Dec 9 2020 Wim Taymans <wtaymans@redhat.com> - 1.16.1-2
- Suppress documentation in Flatpak builds
- Resolves: rhbz#1895938