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fix path traversal bug in router

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Signed-off-by: Jari Kolehmainen <jari.kolehmainen@gmail.com>
This commit is contained in:
Jari Kolehmainen 2021-03-26 13:27:32 +02:00
parent 0765bcee9c
commit 94a195ba29
1 changed files with 11 additions and 1 deletions
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12
src/main/router.ts
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@ -40,10 +40,12 @@ export interface LensApiRequest<P = any> {
export class Router {
protected router: any;
protected staticRootPath: string;
public constructor() {
this.router = new Call.Router();
this.addRoutes();
this.staticRootPath = path.resolve(__static);
}
public async route(cluster: Cluster, req: http.IncomingMessage, res: http.ServerResponse): Promise<boolean> {
@ -102,7 +104,15 @@ export class Router {
}
async handleStaticFile(filePath: string, res: http.ServerResponse, req: http.IncomingMessage, retryCount = 0) {
const asset = path.join(__static, filePath);
const asset = path.join(this.staticRootPath, filePath);
const normalizedFilePath = path.resolve(asset);
if (!normalizedFilePath.startsWith(this.staticRootPath)) {
res.statusCode = 404;
res.end();
return;
}
try {
const filename = path.basename(req.url);