CVE-2024-23823 CORS settings overly permissive in vantage6

Medium 4.2 Published Updated

The vantage6 server lacks CORS restrictions, potentially allowing unauthorized cross-origin requests, though impact is limited by lack of session cookies.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
Available

What is CVE-2024-23823?

CVE-2024-23823 is a medium-severity vulnerability in vantage6, published on 14 Mar 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. The vantage6 server has no restrictions on CORS settings. It should be possible for people to set the allowed origins of the server. The impact is limited because v6 does not use session cookies. This issue has been addressed in commit `70bb4e1d8` and is expected to ship in subsequent releases. Users are advised to upgrade as soon as a new release is available. There are no known workarounds for this vulnerability.

Weakness: CWE-942, CWE-863

Which versions are affected by CVE-2024-23823?

4 open source packages ship an affected version, including vantage6 and vantage6-server. It affects 1 product.

PackageAffectedFixed in
vantage6 PyPIAll versions4.3.0
vantage6 PyPIAll versions4.3.0
vantage6 PyPIAll versions4.3.0
vantage6-server PyPIAll versions4.2.1

Products include Vantage6 Vantage6.

How do I fix CVE-2024-23823?

Upgrade vantage6 to 4.3.0 or later.

Is CVE-2024-23823 being exploited?

There is no known exploitation of CVE-2024-23823 in the wild and no public exploit code.

Sources

Also known as GHSA-4946-85pr-fvxh, PYSEC-2024-326, PYSEC-2026-2004.

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