Wireshark-bugs: [Wireshark-bugs] [Bug 5698] New: Potential access violation when writing to LANa
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Wed, 16 Feb 2011 13:35:32 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5698

           Summary: Potential access violation when writing to LANalyzer
                    files
           Product: Wireshark
           Version: 1.4.3
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Major
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: robert@xxxxxxxxxxxxxx


Robert Bullen <robert@xxxxxxxxxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #5947|                            |review_for_checkin?
               Flag|                            |

Created an attachment (id=5947)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=5947)
A proposed fix

Build Information:
Version 1.4.3 (SVN Rev 35482 from /trunk-1.4)

Copyright 1998-2011 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+ 2.16.6, with GLib 2.22.4, with WinPcap (version
unknown), with libz 1.2.3, without POSIX capabilities, without libpcre, with
SMI
0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS 2.8.5, with
Gcrypt 1.4.5, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built
Jan
11 2011), 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 2.8.5, Gcrypt 1.4.5, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 30729

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

Check the man page and http://www.wireshark.org for more information.
--
This bug is in the Wiretap library.

In function lanalyzer_dump_header() (lanalyzer.c:656) an unsafe cast is made in
situations where long is 32 bits and time_t is 64 bits:

struct tm *fT = localtime((time_t *) &(itmp->start.tv_sec));

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