CVE-2023-3485 Insecure Default Authorization in Temporal Server

What is CVE-2023-3485?

CVE-2023-3485 is a low-severity missing authorization vulnerability in Temporal Server, published on 30 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Insecure defaults in open-source Temporal Server before version 1.20 on all platforms allows an attacker to craft a task token with access to a namespace other than the one specified in the request. Creation of this task token must be done outside of the normal Temporal server flow. It requires the namespace UUID and information from the workflow history for the target namespace. Under these conditions, it is possible to interfere with pending tasks in other namespaces, such as marking a task failed or completed. If a task is targeted for completion by the attacker, the targeted namespace must also be using the same data converter configuration as the initial, valid, namespace for the task completion payload to be decoded by workers in the target namespace.

Weakness: CWE-863, CWE-1188

Which versions are affected by CVE-2023-3485?

4 open source packages ship an affected version, including go.temporal.io/server and temporal. It affects 1 product.

Products include Temporal Temporal.

How do I fix CVE-2023-3485?

Upgrade go.temporal.io/server to 1.20.0 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-3485 being exploited?

There is no known exploitation of CVE-2023-3485 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-temporal-2023-3485, ECHO-0d64-2252-d1af, GHSA-gm2g-2xr9-pxxj, GO-2023-1879, MINI-2xxm-ppwm-fr8c, MINI-j9rf-3c8f-mwv3.