CVE-2024-28197 Account Takeover via Session Fixation in Zitadel [Bypassing MFA]

High 7.5 Published 11 Mar 2024 Updated 26 Aug 2024

Attackers can hijack user sessions and bypass MFA by exploiting cookie accessibility on subdomains, requiring a malicious link interaction.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2024-28197?

CVE-2024-28197 is a high-severity authentication bypass vulnerability in zitadel, published on 11 Mar 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Zitadel is an open source identity management system. Zitadel uses a cookie to identify the user agent (browser) and its user sessions. Although the cookie was handled according to best practices, it was accessible on subdomains of the ZITADEL instance. An attacker could take advantage of this and provide a malicious link hosted on the subdomain to the user to gain access to the victim’s account in certain scenarios. A possible victim would need to login through the malicious link for this exploit to work. If the possible victim already had the cookie present, the attack would not succeed. The attack would further only be possible if there was an initial vulnerability on the subdomain. This could either be the attacker being able to control DNS or a XSS vulnerability in an application hosted on a subdomain. Versions 2.46.0, 2.45.1, and 2.44.3 have been patched. Zitadel recommends upgrading to the latest versions available in due course. Note that applying the patch will invalidate the current cookie and thus users will need to start a new session and existing sessions (user selection) will be empty. For self-hosted environments unable to upgrade to a patched version, prevent setting the following cookie name on subdomains of your Zitadel instance (e.g. within your WAF): `__Secure-zitadel-useragent`.

Weakness: CWE-384, CWE-269

Which versions are affected by CVE-2024-28197?

5 open source packages ship an affected version, including github.com/zitadel/zitadel. It affects 1 product.

Package	Affected	Fixed in
`github.com/zitadel/zitadel` Go	All versions	None
`github.com/zitadel/zitadel` Go	All versions	`2.44.3`
`github.com/zitadel/zitadel` Go	All versions	`2.44.3`
`github.com/zitadel/zitadel` Go	From `2.45.0`	`2.45.1`
`github.com/zitadel/zitadel` Go	From `2.45.0`	`2.45.1`

Products include Zitadel Zitadel.

How do I fix CVE-2024-28197?

Upgrade github.com/zitadel/zitadel to a fixed version for your release line: 2.44.3 or 2.45.1.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2024-28197 being exploited?

There is no known exploitation of CVE-2024-28197 in the wild and no public exploit code.

Sources

Also known as GHSA-mq4x-r2w3-j7mr, GO-2024-2637.