Graylog2 Server up to 5.1.10/5.2.3 /api/system/sessions session fixiation

Summaryinfo

A vulnerability classified as critical was found in Graylog2 Server up to 5.1.10/5.2.3. This affects an unknown part of the file /api/system/sessions. The manipulation results in session fixiation. This vulnerability is cataloged as CVE-2024-24823. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in Graylog2 Server up to 5.1.10/5.2.3. Affected is an unknown function of the file /api/system/sessions. The manipulation with an unknown input leads to a session fixiation vulnerability. CWE is classifying the issue as CWE-384. Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. This is going to have an impact on integrity. CVE summarizes:

Graylog is a free and open log management platform. Starting in version 4.3.0 and prior to versions 5.1.11 and 5.2.4, reauthenticating with an existing session cookie would re-use that session id, even if for different user credentials. In this case, the pre-existing session could be used to gain elevated access to an existing Graylog login session, provided the malicious user could successfully inject their session cookie into someone else's browser. The complexity of such an attack is high, because it requires presenting a spoofed login screen and injection of a session cookie into an existing browser, potentially through a cross-site scripting attack. No such attack has been discovered. Graylog 5.1.11 and 5.2.4, and any versions of the 6.0 development branch, contain patches to not re-use sessions under any circumstances. Some workarounds are available. Using short session expiration and explicit log outs of unused sessions can help limiting the attack vector. Unpatched this vulnerability exists, but is relatively hard to exploit. A proxy could be leveraged to clear the `authentication` cookie for the Graylog server URL for the `/api/system/sessions` endpoint, as that is the only one vulnerable.

The weakness was shared 02/07/2024 as GHSA-3xf8-g8gr-g7rh. The advisory is available at github.com. This vulnerability is traded as CVE-2024-24823 since 01/31/2024. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 5.1.11, 5.2.4 or 6.0 eliminates this vulnerability. Applying the patch 1596b749db86368ba476662f23a0f0c5ec2b5097 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.

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Productinfo

Vendor

• Graylog2

Name

• Server

Version

• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 5.1.5
• 5.1.6
• 5.1.7
• 5.1.8
• 5.1.9
• 5.1.10
• 5.2.0
• 5.2.1
• 5.2.2
• 5.2.3

License

• open-source

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