CVE-2024-42353

Public Exploit
WebOb's location header normalization during redirect leads to open redirect

Description

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.12%
Vendor Advisory github.com
Affected: Pylons webob
Published at:
Updated at:

References

Link Tags
https://github.com/Pylons/webob/security/advisories/GHSA-mg3v-6m49-jhp3 vendor advisory exploit
https://github.com/Pylons/webob/commit/f689bcf4f0a1f64f1735b1d5069aef5be6974b5b patch

Frequently Asked Questions

What is the severity of CVE-2024-42353?
CVE-2024-42353 has been scored as a medium severity vulnerability.
How to fix CVE-2024-42353?
To fix CVE-2024-42353, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-42353 being actively exploited in the wild?
It is possible that CVE-2024-42353 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-42353?
CVE-2024-42353 affects Pylons webob.
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