Vulnerability · Published Mar 25, 2024 · Assigned by GitHub_M
CVE-2024-29041Express.js Open Redirect in malformed URLs
Medium 6.1
In plain English
A medium-severity open redirect in express from expressjs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Express.js minimalist web framework for node. Versions of Express.js prior to 4.19.0 and all pre-release alpha and beta versions of 5.0 are affected by an open redirect vulnerability using malformed URLs. When a user of Express performs a redirect using a user-provided URL Express performs an encode [using `encodeurl`](https://github.com/pillarjs/encodeurl) on the contents before passing it to the `location` header. This can cause malformed URLs to be evaluated in unexpected ways by common redirect allow list implementations in Express applications, leading to an Open Redirect via bypass of a properly implemented allow list. The main method impacted is `res.location()` but this is also called from within `res.redirect()`. The vulnerability is fixed in 4.19.2 and 5.0.0-beta.3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-express | no fix listed | DEBIAN-CVE-2024-29041 |
| Debian:13 | node-express | 4.19.2+~cs8.36.21-1 | DEBIAN-CVE-2024-29041 |
| Debian:14 | node-express | 4.19.2+~cs8.36.21-1 | DEBIAN-CVE-2024-29041 |
| npm | express | 4.19.2 | GHSA-rv95-896h-c2vc |
| npm | express | 5.0.0-beta.3 | GHSA-rv95-896h-c2vc |
Affected products (as reported)
Weakness: CWE-601, CWE-1286 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- https://github.com/expressjs/express/security/advisories/GHSA-rv95-896h-c2vc x_refsource_CONFIRM
- https://github.com/koajs/koa/issues/1800 x_refsource_MISC
- https://github.com/expressjs/express/pull/5539 x_refsource_MISC
- https://github.com/expressjs/express/commit/0867302ddbde0e9463d0564fea5861feb708c2dd x_refsource_MISC
- https://github.com/expressjs/express/commit/0b746953c4bd8e377123527db11f9cd866e39f94 x_refsource_MISC
- https://expressjs.com/en/4x/api.html#res.location x_refsource_MISC