security_rust/protocol/
request_smuggling.rs

1// Copyright (c) 2026 erik <erik@erik.xyz> — https://erik.xyz
2
3use regex::Regex;
4use std::sync::LazyLock;
5
6use crate::{AttackCategory, DetectionResult, Detector, Severity};
7
8static PATTERNS: LazyLock<Vec<Regex>> = LazyLock::new(|| {
9    vec![
10        Regex::new(r"(?i)Transfer-Encoding:.*\r\n.*Transfer-Encoding:").unwrap(),
11        Regex::new(r"(?i)Transfer-Encoding:[\s]*chunked").unwrap(),
12        Regex::new(r"(?i)Content-Length:[\s]*0").unwrap(),
13        Regex::new(r"(?i)\r\n0\r\n").unwrap(),
14    ]
15});
16
17pub struct RequestSmugglingDetector;
18
19impl Detector for RequestSmugglingDetector {
20    fn name(&self) -> &'static str {
21        "request_smuggling"
22    }
23
24    fn detect(&self, input: &str) -> Option<DetectionResult> {
25        for re in PATTERNS.iter() {
26            if let Some(m) = re.find(input) {
27                return Some(DetectionResult {
28                    attack_type: "request_smuggling".into(),
29                    category: AttackCategory::Protocol,
30                    severity: Severity::High,
31                    matched_pattern: m.as_str().to_string(),
32                    offset: m.start(),
33                    message: "HTTP request smuggling detected".into(),
34                });
35            }
36        }
37        None
38    }
39}
security_rust/protocol/request_smuggling.rs

security_rust/protocol/
request_smuggling.rs
