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// Ticketbleed Vulnerability Test
// CVE-2016-9244
//
// Ticketbleed is a vulnerability in F5 BIG-IP that leaks 31 bytes of uninitialized memory
// when processing TLS session tickets. This can expose sensitive information including
// session keys, passwords, and other confidential data.
use crate::Result;
use crate::protocols::Protocol;
use crate::protocols::handshake::ClientHelloBuilder;
use crate::utils::network::Target;
use std::time::Duration;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::TcpStream;
use tokio::time::timeout;
/// Ticketbleed vulnerability tester
pub struct TicketbleedTester {
target: Target,
}
impl TicketbleedTester {
pub fn new(target: Target) -> Self {
Self { target }
}
/// Test for Ticketbleed vulnerability
pub async fn test(&self) -> Result<TicketbleedTestResult> {
let vulnerable = self.test_session_ticket_leak().await?;
let details = if vulnerable {
"Vulnerable to Ticketbleed (CVE-2016-9244) - Server leaks memory in session ticket responses".to_string()
} else {
"Not vulnerable - No memory leak detected in session ticket handling".to_string()
};
Ok(TicketbleedTestResult {
vulnerable,
details,
})
}
/// Test for session ticket memory leak
async fn test_session_ticket_leak(&self) -> Result<bool> {
let addr = self.target.socket_addrs()[0];
match timeout(Duration::from_secs(5), TcpStream::connect(addr)).await {
Ok(Ok(mut stream)) => {
// Send ClientHello with SessionTicket extension
let client_hello = self.build_client_hello_with_session_ticket();
stream.write_all(&client_hello).await?;
// Read ServerHello and NewSessionTicket
let mut buffer = vec![0u8; 16384];
match timeout(Duration::from_secs(3), stream.read(&mut buffer)).await {
Ok(Ok(n)) if n > 0 => {
// Parse response for NewSessionTicket message
let has_new_ticket = self.parse_new_session_ticket(&buffer[..n])?;
if has_new_ticket {
// Send second ClientHello with the received ticket
let client_hello2 =
self.build_client_hello_with_received_ticket(&buffer[..n]);
stream.write_all(&client_hello2).await?;
// Read response
let mut response = vec![0u8; 16384];
match timeout(Duration::from_secs(3), stream.read(&mut response)).await
{
Ok(Ok(m)) if m > 0 => {
// Check for anomalous ticket lengths (31 extra bytes)
let leaked = self.detect_memory_leak(&response[..m])?;
Ok(leaked)
}
_ => Ok(false),
}
} else {
Ok(false)
}
}
_ => Ok(false),
}
}
_ => Ok(false),
}
}
/// Build ClientHello with SessionTicket extension using ClientHelloBuilder
fn build_client_hello_with_session_ticket(&self) -> Vec<u8> {
let mut builder = ClientHelloBuilder::new(Protocol::TLS12);
builder.for_vulnerability_testing().add_session_ticket(); // Add empty session ticket for ticketbleed testing
builder.build().unwrap_or_else(|_| Vec::new())
}
/// Build ClientHello with received session ticket
fn build_client_hello_with_received_ticket(&self, _server_response: &[u8]) -> Vec<u8> {
// Extract ticket from NewSessionTicket message
// For simplicity, we'll send a ClientHello with an empty ticket
// Real implementation would parse and extract the actual ticket
self.build_client_hello_with_session_ticket()
}
/// Parse NewSessionTicket message from server response
fn parse_new_session_ticket(&self, response: &[u8]) -> Result<bool> {
// Look for Handshake type 0x04 (NewSessionTicket)
for i in 0..response.len().saturating_sub(10) {
if response[i] == 0x16 && // Handshake record
i + 5 < response.len() &&
response[i + 5] == 0x04
{
// NewSessionTicket
return Ok(true);
}
}
Ok(false)
}
/// Detect memory leak in session ticket response
fn detect_memory_leak(&self, response: &[u8]) -> Result<bool> {
// Look for NewSessionTicket with anomalous length
// Ticketbleed leaks 31 extra bytes
for i in 0..response.len().saturating_sub(10) {
if response[i] == 0x16 && // Handshake record
i + 5 < response.len() &&
response[i + 5] == 0x04
{
// NewSessionTicket
// Check ticket length
if i + 10 < response.len() {
let ticket_len = u16::from_be_bytes([response[i + 8], response[i + 9]]);
// F5 BIG-IP vulnerable versions leak 31 bytes
// Look for patterns indicating uninitialized memory
if ticket_len > 0 && i + 10 + ticket_len as usize <= response.len() {
let ticket_data = &response[i + 10..i + 10 + ticket_len as usize];
// Check for suspicious patterns (null bytes, repetitive patterns)
let null_count = ticket_data.iter().filter(|&&b| b == 0).count();
let is_suspicious = null_count > ticket_data.len() / 4;
return Ok(is_suspicious);
}
}
}
}
Ok(false)
}
}
/// Ticketbleed test result
#[derive(Debug, Clone)]
pub struct TicketbleedTestResult {
pub vulnerable: bool,
pub details: String,
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_ticketbleed_result() {
let result = TicketbleedTestResult {
vulnerable: false,
details: "Test".to_string(),
};
assert!(!result.vulnerable);
}
#[test]
fn test_client_hello_with_session_ticket() {
let target = Target::with_ips(
"example.com".to_string(),
443,
vec!["93.184.216.34".parse().unwrap()],
)
.unwrap();
let tester = TicketbleedTester::new(target);
let hello = tester.build_client_hello_with_session_ticket();
assert!(hello.len() > 50);
assert_eq!(hello[0], 0x16); // Handshake
assert_eq!(hello[5], 0x01); // ClientHello
// Check for SessionTicket extension (0x0023)
let has_ticket_ext = hello.windows(2).any(|w| w == [0x00, 0x23]);
assert!(has_ticket_ext);
}
}