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
|
description = [[
Detects Ruby on Rails servers vulnerable to object injection, remote command
executions and denial of service attacks. (CVE-2013-0156)
All Ruby on Rails versions before 2.3.15, 3.0.x before 3.0.19, 3.1.x before
3.1.10, and 3.2.x before 3.2.11 are vulnerable. This script sends 3 harmless
YAML payloads to detect vulnerable installations. If the malformed object
receives a status 500 response, the server is processing YAML objects and
therefore is likely vulnerable.
References:
* https://community.rapid7.com/community/metasploit/blog/2013/01/10/exploiting-ruby-on-rails-with-metasploit-cve-2013-0156',
* https://groups.google.com/forum/?fromgroups=#!msg/rubyonrails-security/61bkgvnSGTQ/nehwjA8tQ8EJ',
* http://cvedetails.com/cve/2013-0156/
]]
---
-- @usage
-- nmap -sV --script http-vuln-cve2013-0156 <target>
-- nmap -sV --script http-vuln-cve2013-0156 --script-args uri="/test/" <target>
--
-- @output
-- PORT STATE SERVICE REASON
-- 80/tcp open http syn-ack
-- | http-vuln-cve2013-0156:
-- | VULNERABLE:
-- | Parameter parsing vulnerabilities in several versions of Ruby on Rails allow object injection, remote command execution and Denial Of Service attacks (CVE-2013-0156)
-- | State: VULNERABLE
-- | Risk factor: High
-- | Description:
-- | All Ruby on Rails versions before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, and 3.2.x before 3.2.11 are vulnerable to object injection, remote command execution and denial of service attacks.
-- | The attackers don't need to be authenticated to exploit these vulnerabilities.
-- |
-- | References:
-- | https://groups.google.com/forum/?fromgroups=#!msg/rubyonrails-security/61bkgvnSGTQ/nehwjA8tQ8EJ
-- | https://community.rapid7.com/community/metasploit/blog/2013/01/10/exploiting-ruby-on-rails-with-metasploit-cve-2013-0156
-- |_ http://cvedetails.com/cve/2013-0156/
--
-- @args http-vuln-cve2013-0156.uri Basepath URI (default: /).
---
-- TODO:
-- * Add argument to exploit cmd exec vuln
author = "Paulino Calderon <calderon@websec.mx>"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"exploit","vuln"}
local http = require "http"
local shortport = require "shortport"
local stdnse = require "stdnse"
local vulns = require "vulns"
portrule = shortport.http
local PAYLOAD_OK = [=[<?xml version="1.0" encoding="UTF-8"?>
<probe type="string"><![CDATA[
nmap
]]></probe>]=]
local PAYLOAD_TIME = [=[<?xml version="1.0" encoding="UTF-8"?>
<probe type="yaml"><![CDATA[
--- !ruby/object:Time {}
]]></probe>]=]
local PAYLOAD_MALFORMED = [=[<?xml version="1.0" encoding="UTF-8"?>
<probe type="yaml"><![CDATA[
--- !ruby/object:^@
]]></probe>
]=]
---
--detect(host, port, uri)
--Sends 3 payloads where one of them is malformed. Status 500 indicates that yaml parsing is enabled.
---
local function detect(host, port, uri)
local opts = {header={}}
opts["header"]["Content-type"] = 'application/xml'
local req_ok = http.post(host, port, uri, opts, nil, PAYLOAD_OK)
local req_time = http.post(host, port, uri, opts, nil, PAYLOAD_TIME)
stdnse.debug2("First request returned status %d. Second request returned status %d", req_ok.status, req_time.status)
if req_ok.status == 200 and req_time.status == 200 then
local req_malformed = http.post(host, port, uri, opts, nil, PAYLOAD_MALFORMED)
stdnse.debug2("Malformed request returned status %d", req_malformed.status)
if req_malformed.status == 500 then
return true
end
end
return false
end
---
--MAIN
action = function(host, port)
local uri = stdnse.get_script_args(SCRIPT_NAME..".uri") or "/"
local vuln_table = {
title = "Parameter parsing vulnerabilities in several versions of Ruby on Rails allow object injection, remote command execution and Denial Of Service attacks (CVE-2013-0156)",
state = vulns.STATE.NOT_VULN,
risk_factor = "High",
description = [[
All Ruby on Rails versions before 2.3.15, 3.0.x before 3.0.19, 3.1.x before 3.1.10, and 3.2.x before 3.2.11 are vulnerable to object injection, remote command execution and denial of service attacks.
The attackers don't need to be authenticated to exploit these vulnerabilities.
]],
references = {
'https://community.rapid7.com/community/metasploit/blog/2013/01/10/exploiting-ruby-on-rails-with-metasploit-cve-2013-0156',
'https://groups.google.com/forum/?fromgroups=#!msg/rubyonrails-security/61bkgvnSGTQ/nehwjA8tQ8EJ',
'http://cvedetails.com/cve/2013-0156/',
}
}
if detect(host,port,uri) then
stdnse.debug1("Received status 500 as expected in vulnerable installations. Marking as vulnerable...")
vuln_table.state = vulns.STATE.VULN
local report = vulns.Report:new(SCRIPT_NAME, host, port)
return report:make_output(vuln_table)
end
return nil
end
|
