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Fencer Intel
medium 5.9

CVE-2022-33683 json

Disabled Certificate Validation makes Broker, Proxy Admin Clients vulnerable to MITM attack

published 4y ago modified 4mo ago also GHSA-j3qw-g67q-7m64 , EUVD-2022-6846

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 52%
public exploits
0
none known

Summary

Apache Pulsar Brokers and Proxies create an internal Pulsar Admin Client that does not verify peer TLS certificates, even when tlsAllowInsecureConnection is disabled via configuration. The Pulsar Admin Client's intra-cluster and geo-replication HTTPS connections are vulnerable to man in the middle attacks, which could leak authentication data, configuration data, and any other data sent by these clients. 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. This issue affects Apache Pulsar Broker and 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

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 Intel 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.