From 32db6f504473c118e875f54c6a08b9c6884a3123 Mon Sep 17 00:00:00 2001 From: Leo Famulari Date: Sat, 24 Apr 2021 14:47:54 -0400 Subject: gnu: gst-plugins-ugly: Fix some out-of-bounds reads. * gnu/packages/patches/gst-plugins-ugly-fix-out-of-bound-reads.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/gstreamer.scm (gst-plugins-ugly)[source]: Use it. --- gnu/local.mk | 1 + gnu/packages/gstreamer.scm | 1 + .../gst-plugins-ugly-fix-out-of-bound-reads.patch | 119 +++++++++++++++++++++ 3 files changed, 121 insertions(+) create mode 100644 gnu/packages/patches/gst-plugins-ugly-fix-out-of-bound-reads.patch (limited to 'gnu') diff --git a/gnu/local.mk b/gnu/local.mk index 18ebbcd0ce..6e4a06cc34 100644 --- a/gnu/local.mk +++ b/gnu/local.mk @@ -1175,6 +1175,7 @@ dist_patch_DATA = \ %D%/packages/patches/gst-plugins-good-fix-test.patch \ %D%/packages/patches/gst-plugins-good-CVE-2021-3497.patch \ %D%/packages/patches/gst-plugins-good-CVE-2021-3498.patch \ + %D%/packages/patches/gst-plugins-ugly-fix-out-of-bound-reads.patch \ %D%/packages/patches/guile-1.8-cpp-4.5.patch \ %D%/packages/patches/guile-2.2-skip-oom-test.patch \ %D%/packages/patches/guile-2.2-skip-so-test.patch \ diff --git a/gnu/packages/gstreamer.scm b/gnu/packages/gstreamer.scm index 7d9c5c993f..9e70961655 100644 --- a/gnu/packages/gstreamer.scm +++ b/gnu/packages/gstreamer.scm @@ -793,6 +793,7 @@ par compared to the rest.") (uri (string-append "https://gstreamer.freedesktop.org/src/" name "/" name "-" version ".tar.xz")) + (patches (search-patches "gst-plugins-ugly-fix-out-of-bound-reads.patch")) (sha256 (base32 "1nwbcv5yaib3d8icvyja3zf6lyjf5zf1hndbijrhj8j7xlia0dx3")))) (build-system meson-build-system) diff --git a/gnu/packages/patches/gst-plugins-ugly-fix-out-of-bound-reads.patch b/gnu/packages/patches/gst-plugins-ugly-fix-out-of-bound-reads.patch new file mode 100644 index 0000000000..3c6a96f45d --- /dev/null +++ b/gnu/packages/patches/gst-plugins-ugly-fix-out-of-bound-reads.patch @@ -0,0 +1,119 @@ +Fix out of bounds reads when parsing audio and video packets: + +https://security-tracker.debian.org/tracker/TEMP-0000000-4DAA44 +https://gitlab.freedesktop.org/gstreamer/gst-plugins-ugly/-/issues/37 + +Patch copied from upstream source repository: + +https://gitlab.freedesktop.org/gstreamer/gst-plugins-ugly/-/commit/3aba7d1e625554b2407bc77b3d09b4928b937d5f +From 3aba7d1e625554b2407bc77b3d09b4928b937d5f Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= +Date: Wed, 3 Mar 2021 11:05:14 +0200 +Subject: [PATCH] rmdemux: Make sure we have enough data available when parsing + audio/video packets + +Otherwise there will be out-of-bounds reads and potential crashes. + +Thanks to Natalie Silvanovich for reporting. + +Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-ugly/-/issues/37 + +Part-of: +--- + gst/realmedia/rmdemux.c | 35 +++++++++++++++++++++++++++++++++++ + 1 file changed, 35 insertions(+) + +diff --git a/gst/realmedia/rmdemux.c b/gst/realmedia/rmdemux.c +index 6cc659a1..68b0736b 100644 +--- a/gst/realmedia/rmdemux.c ++++ b/gst/realmedia/rmdemux.c +@@ -2223,6 +2223,9 @@ gst_rmdemux_parse_video_packet (GstRMDemux * rmdemux, GstRMDemuxStream * stream, + + gst_buffer_map (in, &map, GST_MAP_READ); + ++ if (map.size < offset) ++ goto not_enough_data; ++ + data = map.data + offset; + size = map.size - offset; + +@@ -2289,6 +2292,9 @@ gst_rmdemux_parse_video_packet (GstRMDemux * rmdemux, GstRMDemuxStream * stream, + } + GST_DEBUG_OBJECT (rmdemux, "fragment size %d", fragment_size); + ++ if (map.size < (data - map.data) + fragment_size) ++ goto not_enough_data; ++ + /* get the fragment */ + fragment = + gst_buffer_copy_region (in, GST_BUFFER_COPY_ALL, data - map.data, +@@ -2437,6 +2443,9 @@ gst_rmdemux_parse_audio_packet (GstRMDemux * rmdemux, GstRMDemuxStream * stream, + GstFlowReturn ret; + GstBuffer *buffer; + ++ if (gst_buffer_get_size (in) < offset) ++ goto not_enough_data; ++ + buffer = gst_buffer_copy_region (in, GST_BUFFER_COPY_MEMORY, offset, -1); + + if (rmdemux->first_ts != -1 && timestamp > rmdemux->first_ts) +@@ -2467,9 +2476,19 @@ gst_rmdemux_parse_audio_packet (GstRMDemux * rmdemux, GstRMDemuxStream * stream, + ret = gst_pad_push (stream->pad, buffer); + } + ++done: + gst_buffer_unref (in); + + return ret; ++ ++ /* ERRORS */ ++not_enough_data: ++ { ++ GST_ELEMENT_WARNING (rmdemux, STREAM, DECODE, ("Skipping bad packet."), ++ (NULL)); ++ ret = GST_FLOW_OK; ++ goto done; ++ } + } + + static GstFlowReturn +@@ -2490,6 +2509,9 @@ gst_rmdemux_parse_packet (GstRMDemux * rmdemux, GstBuffer * in, guint16 version) + data = map.data; + size = map.size; + ++ if (size < 4 + 6 + 1 + 2) ++ goto not_enough_data; ++ + /* stream number */ + id = RMDEMUX_GUINT16_GET (data); + +@@ -2525,6 +2547,9 @@ gst_rmdemux_parse_packet (GstRMDemux * rmdemux, GstBuffer * in, guint16 version) + + /* version 1 has an extra byte */ + if (version == 1) { ++ if (size < 1) ++ goto not_enough_data; ++ + data += 1; + size -= 1; + } +@@ -2596,6 +2621,16 @@ unknown_stream: + gst_buffer_unref (in); + return GST_FLOW_OK; + } ++ ++ /* ERRORS */ ++not_enough_data: ++ { ++ GST_ELEMENT_WARNING (rmdemux, STREAM, DECODE, ("Skipping bad packet."), ++ (NULL)); ++ gst_buffer_unmap (in, &map); ++ gst_buffer_unref (in); ++ return GST_FLOW_OK; ++ } + } + + gboolean +-- +2.31.1 + -- cgit v1.2.3