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    ]
13});
14
15pub struct RequestSmugglingDetector;
16
17impl Detector for RequestSmugglingDetector {
18    fn name(&self) -> &'static str {
19        "request_smuggling"
20    }
21
22    fn detect(&self, input: &str) -> Option<DetectionResult> {
23        for re in PATTERNS.iter() {
24            if let Some(m) = re.find(input) {
25                return Some(DetectionResult {
26                    attack_type: "request_smuggling".into(),
27                    category: AttackCategory::Protocol,
28                    severity: Severity::High,
29                    matched_pattern: m.as_str().to_string(),
30                    offset: m.start(),
31                    message: "HTTP request smuggling detected".into(),
32                });
33            }
34        }
35        None
36    }
37}
security_rust/protocol/request_smuggling.rs

security_rust/protocol/
request_smuggling.rs
