CVE-2024-47834

Name	CVE-2024-47834
Description	GStreamer is a library for constructing graphs of media-handling components. An Use-After-Free read vulnerability has been discovered affecting the processing of CodecPrivate elements in Matroska streams. In the GST_MATROSKA_ID_CODECPRIVATE case within the gst_matroska_demux_parse_stream function, a data chunk is allocated using gst_ebml_read_binary. Later, the allocated memory is freed in the gst_matroska_track_free function, by the call to g_free (track->codec_priv). Finally, the freed memory is accessed in the caps_serialize function through gst_value_serialize_buffer. The freed memory will be accessed in the gst_value_serialize_buffer function. This results in a UAF read vulnerability, as the function tries to process memory that has already been freed. This vulnerability is fixed in 1.24.10.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
gst-plugins-good1.0 (PTS)	bullseye (security), bullseye	1.18.4-2+deb11u2	vulnerable
	bookworm, bookworm (security)	1.22.0-5+deb12u1	vulnerable
	sid, trixie	1.24.10-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
gst-plugins-good0.10	source	(unstable)	(unfixed)
gst-plugins-good1.0	source	(unstable)	1.24.10-1

Notes

https://gstreamer.freedesktop.org/security/sa-2024-0030.html
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/3863
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8057
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8058 (1.24.10)