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fix: add path validation in index.js #7

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fix: add path validation in index.js #7

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13 changes: 8 additions & 5 deletions plugins/Qtiler2Hajk/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8943,14 +8943,17 @@ app.get(`/plugins/${pluginSlug}/hajk/index.json`, async (req, res, next) => {
try {
const projectId = normalizeProjectId(req.params?.projectId || '');
const filename = String(req.params?.filename || '').replace(/[/\\]/g, '');
if (!projectId || !filename || !/\.(tif|tiff)$/i.test(filename)) {
if (!projectId || !filename || projectId.includes('..') ||
!/\.(tif|tiff)$/i.test(filename)) {
return res.status(400).json({ error: 'invalid_request' });
}
// Resolve the file from the known project directories.
// Resolve the file from the known project directories, ensuring the
// resolved path cannot escape projectsDir (defense against traversal).
const resolvedRoot = path.resolve(projectsDir) + path.sep;
const candidates = [
path.join(projectsDir, projectId, filename),
path.join(projectsDir, projectId, projectId, filename)
];
path.resolve(path.join(projectsDir, projectId, filename)),
path.resolve(path.join(projectsDir, projectId, projectId, filename))
].filter((c) => c.startsWith(resolvedRoot));
let filePath = null;
for (const c of candidates) {
try { await fs.promises.access(c, fs.constants.R_OK); filePath = c; break; } catch { /* not found */ }
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