use crate::detectors::base::{Detector, DetectorConfig};
use uuid::Uuid;
use crate::graph::GraphStore;
use crate::models::{deterministic_finding_id, Finding, Severity};
use anyhow::Result;
use regex::Regex;
use std::path::PathBuf;
use std::sync::OnceLock;
static XXE_PATTERN: OnceLock<Regex> = OnceLock::new();
fn xxe_pattern() -> &'static Regex {
XXE_PATTERN.get_or_init(|| Regex::new(r"(?i)(xml\.parse|parseXML|XMLParser|DocumentBuilder|SAXParser|etree\.parse|lxml\.etree|xml\.etree|DOMParser|XMLReader)").unwrap())
}
pub struct XxeDetector {
repository_path: PathBuf,
max_findings: usize,
}
impl XxeDetector {
pub fn new(repository_path: impl Into<PathBuf>) -> Self {
Self { repository_path: repository_path.into(), max_findings: 50 }
}
}
impl Detector for XxeDetector {
fn name(&self) -> &'static str { "xxe" }
fn description(&self) -> &'static str { "Detects XXE vulnerabilities" }
fn detect(&self, _graph: &GraphStore) -> Result<Vec<Finding>> {
let mut findings = vec![];
let walker = ignore::WalkBuilder::new(&self.repository_path).hidden(false).git_ignore(true).build();
for entry in walker.filter_map(|e| e.ok()) {
if findings.len() >= self.max_findings { break; }
let path = entry.path();
if !path.is_file() { continue; }
let ext = path.extension().and_then(|e| e.to_str()).unwrap_or("");
if !matches!(ext, "py"|"js"|"ts"|"java"|"php"|"cs"|"rb") { continue; }
if let Some(content) = crate::cache::global_cache().get_content(path) {
for (i, line) in content.lines().enumerate() {
if xxe_pattern().is_match(line) {
let has_protection = content.contains("resolve_entities=False") ||
content.contains("FEATURE_EXTERNAL") || content.contains("disallow-doctype");
if !has_protection {
findings.push(Finding {
id: Uuid::new_v4().to_string(),
detector: "XxeDetector".to_string(),
severity: Severity::High,
title: "Potential XXE vulnerability".to_string(),
description: "XML parsing without disabling external entities.".to_string(),
affected_files: vec![path.to_path_buf()],
line_start: Some((i + 1) as u32),
line_end: Some((i + 1) as u32),
suggested_fix: Some("Disable external entity processing.".to_string()),
estimated_effort: Some("20 minutes".to_string()),
category: Some("security".to_string()),
cwe_id: Some("CWE-611".to_string()),
why_it_matters: Some("XXE allows file disclosure and SSRF.".to_string()),
..Default::default()
});
}
}
}
}
}
Ok(findings)
}
}