From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= Date: Thu, 26 Sep 2024 13:43:06 +0300 Subject: id3v2: Don't try parsing extended header if not enough data is available Origin: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/95aabc1976bfe0f3c013b6da033fcd8465078219 Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2024-47542 Thanks to Antonio Morales for finding and reporting the issue. Fixes GHSL-2024-235 Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/3842 Part-of: --- subprojects/gst-plugins-base/gst-libs/gst/tag/id3v2.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) --- a/gst-libs/gst/tag/id3v2.c +++ b/gst-libs/gst/tag/id3v2.c @@ -29,7 +29,7 @@ #define HANDLE_INVALID_SYNCSAFE -static gboolean id3v2_frames_to_tag_list (ID3TagsWorking * work, guint size); +static gboolean id3v2_frames_to_tag_list (ID3TagsWorking * work); #ifndef GST_DISABLE_GST_DEBUG @@ -258,7 +258,7 @@ gst_tag_list_from_id3v2_tag (GstBuffer * buffer) GST_MEMDUMP ("ID3v2 tag (un-unsyced)", uu_data, work.hdr.frame_data_size); } - id3v2_frames_to_tag_list (&work, work.hdr.frame_data_size); + id3v2_frames_to_tag_list (&work); g_free (uu_data); @@ -440,12 +440,17 @@ id3v2_add_id3v2_frame_blob_to_taglist (ID3TagsWorking * work, } static gboolean -id3v2_frames_to_tag_list (ID3TagsWorking * work, guint size) +id3v2_frames_to_tag_list (ID3TagsWorking * work) { guint frame_hdr_size; /* Extended header if present */ if (work->hdr.flags & ID3V2_HDR_FLAG_EXTHDR) { + if (work->hdr.frame_data_size < 4) { + GST_DEBUG ("Tag has no extended header data. Broken tag"); + return FALSE; + } + work->hdr.ext_hdr_size = id3v2_read_synch_uint (work->hdr.frame_data, 4); /* In id3v2.4.x the header size is the size of the *whole* -- 2.45.2