#VU67593 Improper validation of certificate with host mismatch in Apache Pulsar - CVE-2022-33681

Vulnerability identifier: #VU67593

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-2022-33681

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 delayed TLS hostname verification in the Pulsar Java Client and the Pulsar Proxy. 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/q3/226

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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.