352 lines
10 KiB
TypeScript
352 lines
10 KiB
TypeScript
import { tap, expect } from '@git.zone/tstest/tapbundle';
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import * as plugins from '../plugins.js';
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import { EInvoice, PDFExtractor } from '../../../ts/index.js';
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import { PerformanceTracker } from '../performance.tracker.js';
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import * as path from 'path';
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import * as fs from 'fs';
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const performanceTracker = new PerformanceTracker('SEC-05: Path Traversal Prevention');
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tap.test('SEC-05: Path Traversal Prevention - should prevent directory traversal attacks', async () => {
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// Test 1: Path traversal in XML attachment references
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const xmlPathTraversal = await performanceTracker.measureAsync(
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'xml-path-traversal-prevention',
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async () => {
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const traversalPaths = [
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'../../../etc/passwd',
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'..\\..\\..\\windows\\system32\\config\\sam',
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'../../../../../../../../etc/shadow',
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'./../.../.././../etc/hosts',
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'..%2F..%2F..%2Fetc%2Fpasswd',
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'file:///etc/passwd',
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'file://C:\\Windows\\System32\\drivers\\etc\\hosts'
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];
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const results = [];
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for (const maliciousPath of traversalPaths) {
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// Test path traversal in attachment references
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const xml = `<?xml version="1.0" encoding="UTF-8"?>
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<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
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<ID>TEST-001</ID>
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<AdditionalDocumentReference>
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<ID>1</ID>
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<Attachment>
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<ExternalReference>
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<URI>${maliciousPath}</URI>
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</ExternalReference>
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<EmbeddedDocumentBinaryObject filename="${maliciousPath}">
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VGVzdCBkYXRh
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</EmbeddedDocumentBinaryObject>
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</Attachment>
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</AdditionalDocumentReference>
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</Invoice>`;
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try {
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const invoice = await EInvoice.fromXml(xml);
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// If parsing succeeds, the paths are just treated as data
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results.push({
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path: maliciousPath,
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parsed: true,
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// The library should not interpret these as actual file paths
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safe: true
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});
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} catch (error) {
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results.push({
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path: maliciousPath,
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parsed: false,
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error: error.message
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});
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}
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}
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return results;
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}
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);
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console.log('XML path traversal results:', xmlPathTraversal);
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xmlPathTraversal.forEach(result => {
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// Path strings in XML should be treated as data, not file paths
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expect(result.parsed !== undefined).toEqual(true);
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});
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// Test 2: Unicode and encoding bypass attempts
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const encodingBypass = await performanceTracker.measureAsync(
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'encoding-bypass-attempts',
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async () => {
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const encodedPaths = [
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'..%c0%af..%c0%afetc%c0%afpasswd', // Overlong UTF-8
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'..%25c0%25af..%25c0%25afetc%25c0%25afpasswd', // Double encoding
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'..%c1%9c..%c1%9cetc%c1%9cpasswd', // Invalid UTF-8
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'\u002e\u002e/\u002e\u002e/etc/passwd', // Unicode dots
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'..%u002f..%u002fetc%u002fpasswd', // IIS Unicode
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'..%255c..%255c..%255cwindows%255csystem32' // Double encoded backslash
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];
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const results = [];
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for (const encodedPath of encodedPaths) {
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const xml = `<?xml version="1.0" encoding="UTF-8"?>
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<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
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<ID>TEST-002</ID>
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<Note>${encodedPath}</Note>
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<PaymentMeans>
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<PaymentMeansCode>${encodedPath}</PaymentMeansCode>
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</PaymentMeans>
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</Invoice>`;
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try {
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const invoice = await EInvoice.fromXml(xml);
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results.push({
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original: encodedPath,
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parsed: true,
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safe: true
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});
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} catch (error) {
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results.push({
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original: encodedPath,
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parsed: false,
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error: error.message
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});
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}
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}
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return results;
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}
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);
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console.log('Encoding bypass results:', encodingBypass);
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encodingBypass.forEach(result => {
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expect(result.parsed !== undefined).toEqual(true);
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});
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// Test 3: Path traversal in PDF metadata
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const pdfPathTraversal = await performanceTracker.measureAsync(
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'pdf-path-traversal-prevention',
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async () => {
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const results = [];
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// Create a mock PDF with path traversal attempts in metadata
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const traversalPaths = [
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'../../../sensitive/data.xml',
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'..\\..\\..\\config\\secret.xml',
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'file:///etc/invoice.xml'
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];
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for (const maliciousPath of traversalPaths) {
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// Mock PDF with embedded file reference
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const pdfContent = Buffer.from(`%PDF-1.4
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1 0 obj
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<</Type /Catalog /Names <</EmbeddedFiles <</Names [(${maliciousPath}) 2 0 R]>>>>>>
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endobj
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2 0 obj
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<</Type /Filespec /F (${maliciousPath}) /EF <</F 3 0 R>>>>
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endobj
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3 0 obj
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<</Length 4>>
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stream
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test
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endstream
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endobj
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xref
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0 4
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0000000000 65535 f
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0000000015 00000 n
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0000000100 00000 n
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0000000200 00000 n
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trailer
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<</Size 4 /Root 1 0 R>>
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startxref
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300
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%%EOF`);
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try {
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const extractor = new PDFExtractor();
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const result = await extractor.extractXml(pdfContent);
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results.push({
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path: maliciousPath,
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extracted: result.success,
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xmlFound: !!result.xml,
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// PDF extractor should not follow file paths
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safe: true
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});
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} catch (error) {
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results.push({
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path: maliciousPath,
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extracted: false,
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error: error.message
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});
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}
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}
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return results;
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}
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);
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console.log('PDF path traversal results:', pdfPathTraversal);
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pdfPathTraversal.forEach(result => {
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// Path references in PDFs should not be followed
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expect(result.safe || result.extracted === false).toEqual(true);
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});
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// Test 4: Null byte injection for path truncation
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const nullByteInjection = await performanceTracker.measureAsync(
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'null-byte-injection',
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async () => {
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const nullBytePaths = [
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'invoice.xml\x00.pdf',
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'data\x00../../../etc/passwd',
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'file.xml\x00.jpg',
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'../uploads/invoice.xml\x00.exe'
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];
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const results = [];
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for (const nullPath of nullBytePaths) {
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const xml = `<?xml version="1.0" encoding="UTF-8"?>
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<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
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<ID>TEST-003</ID>
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<AdditionalDocumentReference>
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<ID>${nullPath}</ID>
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<DocumentDescription>${nullPath}</DocumentDescription>
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</AdditionalDocumentReference>
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</Invoice>`;
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try {
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const invoice = await EInvoice.fromXml(xml);
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results.push({
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path: nullPath.replace(/\x00/g, '\\x00'),
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parsed: true,
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safe: true
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});
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} catch (error) {
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results.push({
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path: nullPath.replace(/\x00/g, '\\x00'),
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parsed: false,
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error: error.message
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});
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}
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}
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return results;
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}
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);
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console.log('Null byte injection results:', nullByteInjection);
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nullByteInjection.forEach(result => {
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expect(result.parsed !== undefined).toEqual(true);
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});
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// Test 5: Windows UNC path injection
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const uncPathInjection = await performanceTracker.measureAsync(
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'unc-path-injection',
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async () => {
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const uncPaths = [
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'\\\\attacker.com\\share\\evil.xml',
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'\\\\127.0.0.1\\c$\\windows\\system32',
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'//attacker.com/share/payload.xml',
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'\\\\?\\UNC\\attacker\\share\\file'
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];
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const results = [];
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for (const uncPath of uncPaths) {
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const xml = `<?xml version="1.0" encoding="UTF-8"?>
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<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
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<ID>TEST-004</ID>
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<ProfileID>${uncPath}</ProfileID>
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<CustomizationID>${uncPath}</CustomizationID>
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</Invoice>`;
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try {
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const invoice = await EInvoice.fromXml(xml);
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results.push({
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path: uncPath,
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parsed: true,
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safe: true
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});
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} catch (error) {
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results.push({
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path: uncPath,
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parsed: false,
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error: error.message
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});
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}
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}
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return results;
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}
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);
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console.log('UNC path injection results:', uncPathInjection);
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uncPathInjection.forEach(result => {
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// UNC paths in XML data should be treated as strings, not executed
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expect(result.parsed !== undefined).toEqual(true);
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});
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// Test 6: Zip slip vulnerability simulation
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const zipSlipTest = await performanceTracker.measureAsync(
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'zip-slip-prevention',
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async () => {
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const zipSlipPaths = [
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'../../../../../../tmp/evil.xml',
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'../../../etc/invoice.xml',
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'..\\..\\..\\..\\windows\\temp\\malicious.xml'
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];
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const results = [];
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for (const slipPath of zipSlipPaths) {
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// Simulate a filename that might come from a zip entry
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const xml = `<?xml version="1.0" encoding="UTF-8"?>
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<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
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<ID>TEST-005</ID>
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<AdditionalDocumentReference>
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<ID>1</ID>
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<Attachment>
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<EmbeddedDocumentBinaryObject filename="${slipPath}" mimeCode="application/xml">
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PD94bWwgdmVyc2lvbj0iMS4wIj8+Cjxyb290Lz4=
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</EmbeddedDocumentBinaryObject>
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</Attachment>
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</AdditionalDocumentReference>
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</Invoice>`;
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try {
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const invoice = await EInvoice.fromXml(xml);
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// The library should not extract files to the filesystem
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results.push({
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path: slipPath,
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parsed: true,
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safe: true,
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wouldExtract: false
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});
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} catch (error) {
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results.push({
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path: slipPath,
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parsed: false,
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error: error.message
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});
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}
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}
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return results;
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}
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);
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console.log('Zip slip test results:', zipSlipTest);
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zipSlipTest.forEach(result => {
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// The library should not extract embedded files to the filesystem
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expect(result.safe || result.parsed === false).toEqual(true);
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if (result.wouldExtract !== undefined) {
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expect(result.wouldExtract).toEqual(false);
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}
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});
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console.log('Path traversal prevention tests completed');
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});
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// Run the test
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tap.start(); |