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-rw-r--r--gnu/packages/patches/gst-plugins-good-CVE-2021-3497.patch174
1 files changed, 174 insertions, 0 deletions
diff --git a/gnu/packages/patches/gst-plugins-good-CVE-2021-3497.patch b/gnu/packages/patches/gst-plugins-good-CVE-2021-3497.patch
new file mode 100644
index 0000000000..c8c3ee6cf1
--- /dev/null
+++ b/gnu/packages/patches/gst-plugins-good-CVE-2021-3497.patch
@@ -0,0 +1,174 @@
+Fix CVE-2021-3497:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3497
+https://gstreamer.freedesktop.org/security/sa-2021-0002.html
+
+Patch copied from upstream source repository:
+
+https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/commit/9181191511f9c0be6a89c98b311f49d66bd46dc3?merge_request_iid=903
+
+diff --git a/gst/matroska/matroska-demux.c b/gst/matroska/matroska-demux.c
+index 467815986c8c3d86fd8906a0d539b34f67d6693e..0e47ee7b5e25ac3331f30439710ae755235f2a22 100644
+--- a/gst/matroska/matroska-demux.c
++++ b/gst/matroska/matroska-demux.c
+@@ -3851,6 +3851,12 @@ 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 */
+@@ -3858,10 +3864,10 @@ 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;
+@@ -3886,9 +3892,11 @@ 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;
+@@ -3897,6 +3905,7 @@ 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;
+ }
+
+@@ -3918,59 +3927,57 @@ 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 429213f778063ba0063944ab64ad60373bbce5ee..8d4a685a910ec13100a3c3d156b2412d28ec0522 100644
+--- a/gst/matroska/matroska-ids.h
++++ b/gst/matroska/matroska-ids.h
+@@ -688,6 +688,8 @@ 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),
generated by cgit v1.2.3 (git 2.45.0) at 2024-06-13 16:35:16 +0000