https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13939
Bug ID: 13939
Summary: mpeg_descriptor: AC3 System A: Respect descriptor
length
Product: Wireshark
Version: 2.4.0
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: Major
Priority: Low
Component: Dissection engine (libwireshark)
Assignee: bugzilla-ad...@wireshark.org
Reporter: mareko.pal...@gmail.com
Target Milestone: ---
Created attachment 15735
--> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=15735&action=edit
sample rtp packet
Build Information:
TShark (Wireshark) 2.4.0 (37e7d4b891 from master.el6-2.4)
Copyright 1998-2017 Gerald Combs <ger...@wireshark.org> and contributors.
License GPLv2+: GNU GPL version 2 or later
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Compiled (64-bit) with libpcap, without POSIX capabilities, without libnl, with
GLib 2.44.1, with zlib 1.2.3, without SMI, without c-ares, with Lua 5.1.4, with
GnuTLS 3.5.11, with Gcrypt 1.4.5, with MIT Kerberos, without GeoIP, without
nghttp2, without LZ4, without Snappy, with libxml2 2.7.6.
Running on Linux 2.6.32-696.1.1.el6.x86_64, with Intel(R) Xeon(R) CPU
X3440 @ 2.53GHz (with SSE4.2), with 16072 MB of physical memory, with locale
en_US.UTF-8, with libpcap version 1.7.2, with GnuTLS 3.5.11, with Gcrypt 1.4.5,
with zlib 1.2.3.
Built using gcc 6.3.0.
--
As defined in ATSC A/52 Sec A.4.1 the AC-3 Audio Descriptor length is not fixed
and can be terminated at certain points.
Wireshark currently tries to decode to the maximum allowed length (ignoring
actual descriptor_length) which throws an exception (see the attached pcap).
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