CVE-2021-2471: Mysql connector java Incorrect Authorization Vulnerability

MODERATE
Advisory Identifier: GHSA-w6f2-8wx4-47r5
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CVSS 5.9
CWE-863
Published
Advisory Summary

CVE-2021-2471 is a MODERATE (CVSS 5.9) incorrect authorization vulnerability (CWE-863: Incorrect Authorization) affecting Mysql connector java libraries in the Maven ecosystem. The issue involves incorrect authorization in mysql connector java. Remediation is available by upgrading affected packages to version 8.0.27.

CVE-2021-2471 at a Glance

CVE Identifier CVE-2021-2471
GHSA Identifier GHSA-w6f2-8wx4-47r5
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-863: Incorrect Authorization
Affected Product Mysql connector java
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:H/UI:N/S:U/C:H/I:N/A:H).

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

How to Fix CVE-2021-2471

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

mysql:mysql-connector-java fixed: 8.0.27 
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.27</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=mysql

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2021-2471, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=mysql

Analyze the terminal output to locate any version of Mysql connector java in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.0.27), your application is affected.

Note: The mvn dependency:tree -Dincludes=mysql 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-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In Mysql connector java, 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

Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/J). Supported versions that are affected are 8.0.26 and prior. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Connectors. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all MySQL Connectors accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Connectors. CVSS 3.1 Base Score 5.9 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H).

CVE-2021-2471 Affected Mysql connector java Versions

1 component(s)
Fixed Versions:
8.0.27
Product / Package Ecosystem Affected Versions Fixed Version
mysql:mysql-connector-java
maven/mysql/mysql-connector-java
Maven
≥ 8.0.0
< 8.0.27
8.0.27

References

NVD — CVE-2021-2471 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-2471
Mysql connector java Security Information SECURITY
https://www.oracle.com/security-alerts/cpuapr2022.html
Mysql connector java Security Information SECURITY
https://www.oracle.com/security-alerts/cpuoct2021.html

Frequently Asked Questions

What is CVE-2021-2471?
CVE-2021-2471 is a security vulnerability in Mysql connector java involving Incorrect Authorization in MySQL Connector Java under CWE-863: Incorrect Authorization.
Which Mysql connector java versions are affected?
Affected versions include releases prior to 8.0.27 across affected packages: mysql:mysql-connector-java.
What version fixes CVE-2021-2471?
Upgrading to 8.0.27 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mysql-connector-java affected?
Yes, mysql:mysql-connector-java is affected in releases prior to 8.0.27. Upgrade your dependency to 8.0.27 or later.
What is the CVSS score of CVE-2021-2471?
CVE-2021-2471 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2021-2471?
CVE-2021-2471 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check Maven dependencies for CVE-2021-2471?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=mysql'. 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
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w6f2-8wx4-47r5",
  "modified" : "2022-06-22T18:13:52Z",
  "published" : "2022-05-24T19:18:20Z",
  "aliases" : [ "CVE-2021-2471" ],
  "summary" : "Incorrect Authorization in MySQL Connector Java",
  "details" : "Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/J). Supported versions that are affected are 8.0.26 and prior. Difficult to exploit vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Connectors. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all MySQL Connectors accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Connectors. CVSS 3.1 Base Score 5.9 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "mysql:mysql-connector-java"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0.0"
      }, {
        "fixed" : "8.0.27"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 8.0.26"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-2471"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpuapr2022.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.oracle.com/security-alerts/cpuoct2021.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-06-22T18:13:52Z",
    "nvd_published_at" : "2021-10-20T11:16:00Z"
  }
}