https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5362
Summary: Bug in packet-ieee802154.c results in possible null
pointer access attempt
Product: Wireshark
Version: SVN
Platform: Other
OS/Version: Windows XP
Status: NEW
Severity: Major
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: coflynn@xxxxxxxxx
Created an attachment (id=5414)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=5414)
Patch for packet-ieee802154.c to fix memory access error
Build Information:
Built from latest SVN.
Copyright 1998-2010 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 2.24.2, 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
Oct
19 2010), 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.
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The packet-ieee802154.c file uses the "ieee_hints" pointer to pass information
to higher layers.
Depending on the higher layer this may be null, and access to it is usually
performed with a check for such. This is missed in one spot which can result in
a memory access error if the pointer is null.
I cannot attach a test case, as the problem came up with a proprietary plug-in.
However the patch is extremely simple and an 'obvious' bug if you compare how
ieee_hints is accessed in the rest of the file.
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