Wireshark-bugs: [Wireshark-bugs] [Bug 11014] New: ANSI IS-637 dissector asserts on user_data.num

Date: Thu, 26 Feb 2015 12:01:08 +0000
Bug ID 11014
Summary ANSI IS-637 dissector asserts on user_data.num_fields=0, Encoding=0x02(7-bit)
Product Wireshark
Version 1.12.3
Hardware x86-64
OS SuSE
Status UNCONFIRMED
Severity Normal
Priority Low
Component Dissection engine (libwireshark)
Assignee [email protected]
Reporter [email protected]

Build Information:
Version 1.12.3 (Git Rev Unknown from unknown)

Copyright 1998-2015 Gerald Combs <[email protected]> and contributors.
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 GTK+ 3.4.4, with Cairo 1.12.2, with Pango 1.30.1, with
GLib 2.32.4, with libpcap, with libz 1.2.7, without POSIX capabilities, without
libnl, without SMI, without c-ares, without ADNS, without Lua, without Python,
without GnuTLS, with Gcrypt 1.5.3, without Kerberos, without GeoIP, without
PortAudio, with AirPcap.

Running on Linux 3.4.63-2.44-desktop, with locale en_US.UTF-8, with libpcap
version 1.2.1, with libz 1.2.7, Gcrypt 1.5.3, without AirPcap.
        Intel(R) Core(TM) i5-2320 CPU @ 3.00GHz

Built using gcc 4.7.1 20120723 [gcc-4_7-branchrevision 189773].

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.
--
[Dissector bug, protocol ANSI IS-637-A Teleservice: tvbuff.c:353: failed
assertion "datalen>0"]

There is no checking num_fields before calling function tvb_new_octet_aligned
in packet-ansi_637.c function text_decoder


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