#VU67595 Improper Certificate Validation in Apache Pulsar - CVE-2022-33683

Vulnerability identifier: #VU67595

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-2022-33683

CWE-ID: CWE-295

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 Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. 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

---

External links
https://seclists.org/oss-sec/2022/q3/228

---

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.