Wireshark-bugs: [Wireshark-bugs] [Bug 5430] New: Information element Error for supported channel
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Tue, 23 Nov 2010 07:05:12 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5430

           Summary: Information element Error for supported channels
           Product: Wireshark
           Version: 1.4.2
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Trivial
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: olof.johansson@xxxxxxxxxxxxxx


Build Information:

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
Nov
18 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, with AirPcap 4.1.0 build 1622.

Built using Microsoft Visual C++ 9.0 build 30729

--
The supported channels information element(36) is reporting an error with a tag
length >= 10.
The reported error is: "Supported Channels: Error: Tag length too long"

I can't find any info in the specification regarding any limitations on the tag
size.

The tuples in the packet exceeding 10 bytes are parsed correctly anyway so it
doesn't affect the rest of the packet as far as I can tell.

Packet sample with a tag length of 12:
0000   00 00 1a 00 6f 18 00 00 26 cf 5e a6 52 00 00 00
0010   10 0c a0 14 40 01 be a5 00 19 00 00 3c 00 00 23
0020   eb 5a 8a 90 00 12 f3 00 00 03 00 23 eb 5a 8a 90
0030   10 00 21 01 10 00 00 09 63 62 2d 74 65 73 74 31
0040   33 01 08 0c 12 18 24 30 48 60 6c 21 02 fb 12 24
0050   0c 24 04 38 03 64 02 70 08 95 02 a1 02 2d 1a 00
0060   00 18 ff 00 00 00 00 00 00 00 00 00 00 00 00 00
0070   00 00 00 00 00 00 00 00 00 dd 1e 00 90 4c 33 00
0080   00 18 ff 00 00 00 00 00 00 00 00 00 00 00 00 00
0090   00 00 00 00 00 00 00 00 00 62 20 19 0f

It's not a very critical error, but still :)

Best regards,
Olof J

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