CVE-2022-33683

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

MEDIUM
5.9
CVSS Score
Published: September 23, 2022 at 09:25 AM UTC
Updated: June 17, 2026 at 04:49 AM UTC
1 product affected across 1 vendorPulsar

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.7.52.6 and earlier ≤ v ≤ 2.6.42.7 ≤ v ≤ 2.7.42.8 ≤ v ≤ 2.8.32.8.0 ≤ v < 2.8.42.9 ≤ v ≤ 2.9.22.9.0 ≤ v < 2.9.32.10.02.72.82.9
Affected range stops below 2.7.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.8.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.9.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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