Wireshark-bugs: [Wireshark-bugs] [Bug 6948] New: Validation of DHCP Extensions in DHCP Offer pac

Date: Tue, 13 Mar 2012 07:54:42 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6948

           Summary: Validation of DHCP Extensions in DHCP Offer packet
           Product: Wireshark
           Version: 1.4.6
          Platform: x86
        OS/Version: Ubuntu
            Status: NEW
          Severity: Major
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: naboj@xxxxxxx


Build Information:
wireshark 1.4.6

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+ 2.24.4, with GLib 2.28.6, with libpcap 1.1.1, with
libz 1.2.3.4, with POSIX capabilities (Linux), without libpcre, with SMI 0.4.8,
with c-ares 1.7.3, with Lua 5.1, without Python, with GnuTLS 2.8.6, with Gcrypt
1.4.6, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built Mar 18
2011 15:44:36), without AirPcap.
wireshark 1.4.6wireshark 1.4.6

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+ 2.24.4, with GLib 2.28.6, with libpcap 1.1.1, with
libz 1.2.3.4, with POSIX capabilities (Linux), without libpcre, with SMI 0.4.8,
with c-ares 1.7.3, with Lua 5.1, without Python, with GnuTLS 2.8.6, with Gcrypt
1.4.6, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built Mar 18
2011 15:44:36), without AirPcap.

Running on Linux 2.6.38-13-generic, with libpcap version 1.1.1, with libz
1.2.3.4, GnuTLS 2.8.6, Gcrypt 1.4.6.

Built using gcc 4.5.2.

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+ 2.24.4, with GLib 2.28.6, with libpcap 1.1.1, with
libz 1.2.3.4, with POSIX capabilities (Linux), without libpcre, with SMI 0.4.8,
with c-ares 1.7.3, with Lua 5.1, without Python, with GnuTLS 2.8.6, with Gcrypt
1.4.6, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built Mar 18
2011 15:44:36), without AirPcap.

Running on Linux 2.6.38-13-generic, with libpcap version 1.1.1, with libz
1.2.3.4, GnuTLS 2.8.6, Gcrypt 1.4.6.

Built using gcc 4.5.2.
Running on Linux 2.6.38-13-generic, with libpcap version 1.1.1, with libz
1.2.3.4, GnuTLS 2.8.6, Gcrypt 1.4.6.

Built using gcc 4.5.2.
--
At viewing the DHCP Offer packet there are various fields inside the Boostrap
Protocol. RFC2132 defines various extensions by using Option codes.

One of them is Bootfile name with option code 67.
This filename should be according to RFC 3456 a null terminated string.

The missing of the null termination could be showed up as a problem by
wireshark.

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