CVE-2022-33682 Disabled Hostname Verification makes Brokers, Proxies vulnerable to MITM attack

What is CVE-2022-33682?

CVE-2022-33682 is a medium-severity vulnerability in Apache Pulsar, published on 23 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

TLS hostname verification cannot be enabled in the Pulsar Broker's Java Client, the Pulsar Broker's Java Admin Client, the Pulsar WebSocket Proxy's Java Client, and the Pulsar Proxy's Admin Client leaving intra-cluster connections and geo-replication connections vulnerable to man in the middle attacks, which could leak credentials, configuration data, message data, and any other data sent by these clients. The vulnerability is for both the pulsar+ssl protocol and HTTPS. An attacker can only take advantage of this vulnerability by taking control of a machine 'between' the client and the server. The attacker must then actively manipulate traffic to perform the attack by providing the client with a cryptographically valid certificate for an unrelated host. This issue affects Apache Pulsar Broker, Proxy, and WebSocket Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.3; 2.9.0 to 2.9.2; 2.10.0; 2.6.4 and earlier.

Weakness: CWE-295

Which versions are affected by CVE-2022-33682?

16 open source packages ship an affected version, including org.apache.pulsar:pulsar-broker and org.apache.pulsar:pulsar-proxy. It affects 1 product.

Products include Apache Pulsar.

How do I fix CVE-2022-33682?

Upgrade org.apache.pulsar:pulsar-broker to a fixed version for your release line: 2.7.5, 2.10.1, 2.8.4 or 2.9.3.

Is CVE-2022-33682 being exploited?

There is no known exploitation of CVE-2022-33682 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-2023-30429 Apache Pulsar: Incorrect Authorization for Function Worker when using mTLS Authentication through Pulsar Proxy Critical 9.6
• 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

Sources

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

Also known as GHSA-jvf3-mfxv-jcqr.