CVE-2023-30429 Apache Pulsar: Incorrect Authorization for Function Worker when using mTLS Authentication through Pulsar Proxy

What is CVE-2023-30429?

CVE-2023-30429 is a critical missing authorization vulnerability in Apache Pulsar, published on 12 Jul 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Incorrect Authorization vulnerability in Apache Software Foundation Apache Pulsar.

This issue affects Apache Pulsar: before 2.10.4, and 2.11.0.

When a client connects to the Pulsar Function Worker via the Pulsar Proxy where the Pulsar Proxy uses mTLS authentication to authenticate with the Pulsar Function Worker, the Pulsar Function Worker incorrectly performs authorization by using the Proxy's role for authorization instead of the client's role, which can lead to privilege escalation, especially if the proxy is configured with a superuser role.

The recommended mitigation for impacted users is to upgrade the Pulsar Function Worker to a patched version.

2.10 Pulsar Function Worker users should upgrade to at least 2.10.4. 2.11 Pulsar Function Worker users should upgrade to at least 2.11.1. 3.0 Pulsar Function Worker users are unaffected. Any users running the Pulsar Function Worker for 2.9.* and earlier should upgrade to one of the above patched versions.

Weakness: CWE-863

Which versions are affected by CVE-2023-30429?

4 open source packages ship an affected version, including org.apache.pulsar:pulsar. It affects 1 product.

Products include Apache Pulsar.

How do I fix CVE-2023-30429?

Upgrade org.apache.pulsar:pulsar to a fixed version for your release line: 2.10.4 or 2.11.1.

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

Is CVE-2023-30429 being exploited?

There is no known exploitation of CVE-2023-30429 in the wild and no public exploit code.

Other vulnerabilities in Apache Pulsar

• CVE-2021-22160 Authentication with JWT allows use of “none”-algorithm Critical 9.8
• CVE-2024-27135 Apache Pulsar: Improper Input Validation in Pulsar Function Worker allows Remote Code Execution High 8.5
• CVE-2024-27894 Apache Pulsar: Pulsar Functions Worker Allows Unauthorized File Access and Unauthorized HTTP/HTTPS Proxying High 8.5
• CVE-2024-27317 Apache Pulsar: Pulsar Functions Worker's Archive Extraction Vulnerability Allows Unauthorized File Modification High 8.4
• CVE-2022-34321 Apache Pulsar: Improper Authentication for Pulsar Proxy Statistics Endpoint High 8.2

Sources

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

Also known as GHSA-g9cv-v3v4-3h8r.