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Wireshark-bugs: [Wireshark-bugs] [Bug 6933] New: Crash after starting capture

Date: Sat, 10 Mar 2012 10:12:23 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6933

           Summary: Crash after starting capture
           Product: Wireshark
           Version: 1.7.x (Experimental)
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Major
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: jodd@xxxxxx


Build Information:
Version 1.7.1 (SVN Rev 41457 from /trunk)

Copyright 1998-2012 Gerald Combs <gerald@xxxxxxxxxxxxx> 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 (32-bit) with GTK+ 2.24.10, with Cairo 1.10.2, with Pango 1.29.4, with
GLib 2.28.8, with WinPcap (4_1_2), with libz 1.2.5, without POSIX capabilities,
with SMI 0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS
2.10.3, with Gcrypt 1.4.6, with MIT Kerberos, with GeoIP, with PortAudio
V19-devel (built Mar  3 2012), with AirPcap.

Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.1.2
(packet.dll version 4.1.0.2001), based on libpcap version 1.0 branch 1_0_rel0b
(20091008), GnuTLS 2.10.3, Gcrypt 1.4.6, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 21022

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

Check the man page and http://www.wireshark.org for more information.
--
Under some conditions Wireshark crashes in the function capture_opts_log() from
"capture_opts.c" due to access to uninitialized variables.

In the same file the function collect_ifaces() retrieves the options for the
used interface(s) but some of them are only retrieved for remote interfaces.
Later on, in capture_opts_log() all fields from the interface options are
logged which can result into access to uninitialized variables and pointers.
There are more accesses to such fields in e.g. sync_pipe_start() from
"capture_sync.c".

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