#VU67594 Improper validation of certificate with host mismatch in Apache Pulsar - CVE-2022-33682

Vulnerability identifier: #VU67594

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-33682

CWE-ID: CWE-297

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Pulsar
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to 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. A remote attacker can perform MitM attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Pulsar: 2.0.0 - 2.0.1, 2.1.0 - 2.10.0, 2.2.0 - 2.2.1, 2.3.0 - 2.3.2, 2.4.0 - 2.4.2, 2.5.0 - 2.5.2, 2.6.0 - 2.6.4, 2.7.0 - 2.7.4, 2.8.0 - 2.8.3, 2.9.0 - 2.9.2

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External links
https://seclists.org/oss-sec/2022/q3/227

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.