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Fencer Vulns
medium 5.9

CVE-2022-33682 json

Disabled Hostname Verification makes Brokers, Proxies vulnerable to MITM attack

published 2022-09-23 4 y ago modified 2026-06-17 4 mo ago also GHSA-jvf3-mfxv-jcqr , EUVD-2022-6863

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.apache.pulsar:pulsar-broker 2.7.5, 2.8.4, 2.9.3, 2.10.1
  • maven org.apache.pulsar:pulsar-proxy 2.7.5, 2.8.4, 2.9.3, 2.10.1
  • apache pulsar 2.7.5, 2.8.4, 2.9.3

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven org.apache.pulsar:pulsar-broker
<2.7.5
>=2.8.0, <2.8.4
>=2.9.0, <2.9.3
>=2.10.0, <2.10.1
2.7.5
2.8.4
2.9.3
2.10.1
maven org.apache.pulsar:pulsar-proxy
<2.7.5
>=2.8.0, <2.8.4
>=2.9.0, <2.9.3
>=2.10.0, <2.10.1
2.7.5
2.8.4
2.9.3
2.10.1

Affected products

  • Apache Software Foundation Apache Pulsar

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.