Pylons webob up to 1.8.7 Location Header redirect

Summaryinfo

A vulnerability was found in Pylons webob up to 1.8.7 and classified as problematic. This impacts an unknown function of the component Location Header Handler. Such manipulation leads to redirect. This vulnerability is uniquely identified as CVE-2024-42353. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Pylons webob up to 1.8.7 and classified as problematic. Affected by this issue is an unknown code of the component Location Header Handler. The manipulation with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. CVE summarizes:

WebOb provides objects for HTTP requests and responses. When WebOb normalizes the HTTP Location header to include the request hostname, it does so by parsing the URL that the user is to be redirected to with Python's urlparse, and joining it to the base URL. `urlparse` however treats a `//` at the start of a string as a URI without a scheme, and then treats the next part as the hostname. `urljoin` will then use that hostname from the second part as the hostname replacing the original one from the request. This vulnerability is patched in WebOb version 1.8.8.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2024-42353 since 07/30/2024. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. 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 207705 (RHEL 9 : OpenShift Container Platform 4.16.14 (RHSA-2024:6827)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.8.8 eliminates this vulnerability. Applying the patch f689bcf4f0a1f64f1735b1d5069aef5be6974b5b 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 vulnerability database at Tenable (207705). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Pylons

Name

• webob

Version

• 1.8.0
• 1.8.1
• 1.8.2
• 1.8.3
• 1.8.4
• 1.8.5
• 1.8.6
• 1.8.7

License

• open-source

Website

• Product: https://github.com/Pylons/webob/

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

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