Wireshark-bugs: [Wireshark-bugs] [Bug 4412] New: packet-dhcpv6.c dissector error parsing ORO sub
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4412
Summary: packet-dhcpv6.c dissector error parsing ORO suboption
Product: Wireshark
Version: SVN
Platform: Other
OS/Version: Ubuntu
Status: NEW
Severity: Minor
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: alexandre.forget@xxxxxxxxxxxxx
Created an attachment (id=4160)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=4160)
Screenshot with unrecognized suboptions
Build Information:
Version 1.3.3 (SVN Rev 31592 from /trunk)
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 with GTK+ 2.18.3, with GLib 2.22.3, with libpcap 1.0.0, with libz
1.2.3.3, without POSIX capabilities, without libpcre, without SMI, without
c-ares, without ADNS, without Lua, without Python, without GnuTLS, without
Gcrypt, without Kerberos, without GeoIP, without PortAudio, without AirPcap,
with new_packet_list.
Running on Linux 2.6.31-17-generic, with libpcap version 1.0.0.
Built using gcc 4.4.1.
--
This is similar to bug 3987. Hopefully not a duplicate.
When parsing a dhcpv6 packet, the ORO suboption (option request option) has an
offset error and the rest of the cablelabs dhcpv6 suboptions are not parsed.
An error is present in the subroutine for opt_len.
in v1.2.5 the code reads
case CL_OPTION_ORO :
field_len = 2;
opt_len = tlv_len * field_len;
[...]
but should read
case CL_OPTION_ORO :
field_len = 2;
opt_len = tlv_len;
[...]
attached are before and after screenshots, and a capture.
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