CVE-2024-42353 – WebOb's location header normalization during redirect leads to open redirect

https://notcve.org/view.php?id=CVE-2024-42353

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. • https://github.com/Pylons/webob/security/advisories/GHSA-mg3v-6m49-jhp3 https://github.com/Pylons/webob/commit/f689bcf4f0a1f64f1735b1d5069aef5be6974b5b https://access.redhat.com/security/cve/CVE-2024-42353 https://bugzilla.redhat.com/show_bug.cgi?id=2305004 • CWE-601: URL Redirection to Untrusted Site ('Open Redirect') •