CVE-2022-33682: Pulsar broker Improper Certificate Validation Vulnerability

MODERATE
Advisory Identifier: GHSA-jvf3-mfxv-jcqr
CVSS 5.9
CWE-295
Published
Advisory Summary

CVE-2022-33682 is a MODERATE (CVSS 5.9) improper certificate validation vulnerability (CWE-295: Improper Certificate Validation) affecting Pulsar broker libraries in the Maven ecosystem. The issue involves apache pulsar broker, proxy, and websocket proxy vulnerable to improper certificate validation. Remediation is available by upgrading affected packages to version 2.7.5, 2.8.4, 2.9.3, 2.10.1.

CVE-2022-33682 at a Glance

CVE Identifier CVE-2022-33682
GHSA Identifier GHSA-jvf3-mfxv-jcqr
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Pulsar broker
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2022-33682

To remediate this vulnerability, upgrade all affected Pulsar broker dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.apache.pulsar:pulsar-broker fixed: 2.7.5
<dependency>
    <groupId>org.apache.pulsar</groupId>
    <artifactId>pulsar-broker</artifactId>
    <version>2.7.5</version>
</dependency>
org.apache.pulsar:pulsar-proxy fixed: 2.7.5
<dependency>
    <groupId>org.apache.pulsar</groupId>
    <artifactId>pulsar-proxy</artifactId>
    <version>2.7.5</version>
</dependency>
org.apache.pulsar:pulsar-broker fixed: 2.8.4
<dependency>
    <groupId>org.apache.pulsar</groupId>
    <artifactId>pulsar-broker</artifactId>
    <version>2.8.4</version>
</dependency>
org.apache.pulsar:pulsar-proxy fixed: 2.8.4
<dependency>
    <groupId>org.apache.pulsar</groupId>
    <artifactId>pulsar-proxy</artifactId>
    <version>2.8.4</version>
</dependency>
org.apache.pulsar:pulsar-broker fixed: 2.9.3
<dependency>
    <groupId>org.apache.pulsar</groupId>
    <artifactId>pulsar-broker</artifactId>
    <version>2.9.3</version>
</dependency>
org.apache.pulsar:pulsar-proxy fixed: 2.9.3
<dependency>
    <groupId>org.apache.pulsar</groupId>
    <artifactId>pulsar-proxy</artifactId>
    <version>2.9.3</version>
</dependency>
org.apache.pulsar:pulsar-broker fixed: 2.10.1
<dependency>
    <groupId>org.apache.pulsar</groupId>
    <artifactId>pulsar-broker</artifactId>
    <version>2.10.1</version>
</dependency>
org.apache.pulsar:pulsar-proxy fixed: 2.10.1
<dependency>
    <groupId>org.apache.pulsar</groupId>
    <artifactId>pulsar-proxy</artifactId>
    <version>2.10.1</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release:

mvn dependency:tree -Dincludes=org.apache.pulsar

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2022-33682, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.apache.pulsar

Analyze the terminal output to locate any version of Pulsar broker in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.7.5), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.apache.pulsar command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Pulsar broker, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2022-33682 Affected Pulsar broker Versions

8 component(s)
Fixed Versions:
2.7.52.8.42.9.32.10.1
Product / Package Ecosystem Affected Versions Fixed Version
org.apache.pulsar:pulsar-broker
Maven
< 2.7.5
2.7.5
org.apache.pulsar:pulsar-proxy
Maven
< 2.7.5
2.7.5
org.apache.pulsar:pulsar-broker
Maven
≥ 2.8.0
< 2.8.4
2.8.4
org.apache.pulsar:pulsar-proxy
Maven
≥ 2.8.0
< 2.8.4
2.8.4
org.apache.pulsar:pulsar-broker
Maven
≥ 2.9.0
< 2.9.3
2.9.3
org.apache.pulsar:pulsar-proxy
Maven
≥ 2.9.0
< 2.9.3
2.9.3
org.apache.pulsar:pulsar-broker
Maven
≥ 2.10.0
< 2.10.1
All 1 versions
2.10.0
2.10.1
org.apache.pulsar:pulsar-proxy
Maven
≥ 2.10.0
< 2.10.1
All 1 versions
2.10.0
2.10.1

References

Frequently Asked Questions

What is CVE-2022-33682?
CVE-2022-33682 is a security vulnerability in Pulsar broker involving Apache Pulsar Broker, Proxy, and WebSocket Proxy vulnerable to Improper Certificate Validation under CWE-295: Improper Certificate Validation.
Which Pulsar broker versions are affected?
Affected versions include releases prior to 2.7.5, 2.8.4, 2.9.3, 2.10.1 across affected packages: org.apache.pulsar:pulsar-broker, org.apache.pulsar:pulsar-proxy.
What version fixes CVE-2022-33682?
Upgrading to 2.7.5, 2.8.4, 2.9.3, 2.10.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is pulsar-broker affected?
Yes, org.apache.pulsar:pulsar-broker is affected in releases prior to 2.7.5, 2.8.4, 2.9.3, 2.10.1. Upgrade your dependency to 2.7.5, 2.8.4, 2.9.3, 2.10.1 or later.
Is pulsar-proxy affected?
Yes, org.apache.pulsar:pulsar-proxy is affected in releases prior to 2.7.5, 2.8.4, 2.9.3, 2.10.1. Upgrade your dependency to 2.7.5, 2.8.4, 2.9.3, 2.10.1 or later.
What is the CVSS score of CVE-2022-33682?
CVE-2022-33682 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2022-33682?
CVE-2022-33682 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check Maven dependencies for CVE-2022-33682?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.apache.pulsar'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jvf3-mfxv-jcqr",
  "modified" : "2022-09-30T00:09:24Z",
  "published" : "2022-09-25T00:00:27Z",
  "aliases" : [ "CVE-2022-33682" ],
  "summary" : "Apache Pulsar Broker, Proxy, and WebSocket Proxy vulnerable to Improper Certificate Validation",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.pulsar:pulsar-broker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.7.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.pulsar:pulsar-proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.7.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.pulsar:pulsar-broker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.8.0"
      }, {
        "fixed" : "2.8.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.pulsar:pulsar-proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.8.0"
      }, {
        "fixed" : "2.8.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.pulsar:pulsar-broker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.9.0"
      }, {
        "fixed" : "2.9.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.pulsar:pulsar-proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.9.0"
      }, {
        "fixed" : "2.9.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.pulsar:pulsar-broker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.10.0"
      }, {
        "fixed" : "2.10.1"
      } ]
    } ],
    "versions" : [ "2.10.0" ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.apache.pulsar:pulsar-proxy"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.10.0"
      }, {
        "fixed" : "2.10.1"
      } ]
    } ],
    "versions" : [ "2.10.0" ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-33682"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/l0ynfl161qghwfcgbbl8ld9hzbl9t3yx"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-09-30T00:09:24Z",
    "nvd_published_at" : "2022-09-23T10:15:00Z"
  }
}