Express.js prior 4.19.0/5.0.0-beta.3 URL redirect

Summaryinfo

A vulnerability labeled as problematic has been found in Express.js. This impacts an unknown function of the component URL Handler. The manipulation results in redirect. This vulnerability is cataloged as CVE-2024-29041. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Express.js. Affected is an unknown part of the component URL Handler. The manipulation with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2024-29041 since 03/14/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1204.001.

The vulnerability scanner Nessus provides a plugin with the ID 240190 (Ubuntu 20.04 LTS : Express vulnerabilities (USN-7581-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.0 or 5.0.0-beta.3 eliminates this vulnerability. Applying the patch 0867302ddbde0e9463d0564fea5861feb708c2dd is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (240190) and EUVD (EUVD-2024-1007). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• JavaScript Library

Name

• Express.js

License

• open-source

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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