CVE-2023-22102: MySQL Connector/J Auth Bypass Vulnerability

CVE-2023-22102 Overview

CVE-2023-22102 is a vulnerability in the MySQL Connectors product of Oracle MySQL, specifically affecting the Connector/J component. This flaw allows an unauthenticated attacker with network access via multiple protocols to potentially compromise MySQL Connectors. The vulnerability requires human interaction from a person other than the attacker and, while the vulnerability exists in MySQL Connectors, successful exploitation may significantly impact additional products beyond the initial target (scope change). Successful attacks can result in complete takeover of MySQL Connectors, affecting confidentiality, integrity, and availability.

Critical Impact

Successful exploitation allows complete takeover of MySQL Connectors with potential cascading impact to additional products due to scope change. This improper access control vulnerability can compromise the entire database connectivity layer of affected applications.

Affected Products

• Oracle MySQL Connector/J version 8.1.0 and prior
• NetApp OnCommand Insight (uses affected MySQL Connector/J component)
• Applications utilizing vulnerable MySQL Connector/J versions for database connectivity

Discovery Timeline

• October 17, 2023 - CVE-2023-22102 published to NVD
• October 27, 2023 - NetApp releases security advisory NTAP-20231027-0007
• March 6, 2025 - Last updated in NVD database

Technical Details for CVE-2023-22102

Vulnerability Analysis

This vulnerability is classified under CWE-284 (Improper Access Control), indicating a flaw in how the MySQL Connector/J manages access permissions or authentication mechanisms. The vulnerability exists in the Connector/J component, which is Oracle's official JDBC driver for MySQL databases and is widely deployed in Java applications requiring MySQL database connectivity.

The attack requires network access but is considered difficult to exploit, suggesting that specific conditions or configurations must be present for successful exploitation. The requirement for human interaction indicates this may involve scenarios such as tricking a user into connecting to a malicious server or accepting compromised connection parameters. The scope change designation means that a successful attack on MySQL Connectors can affect resources beyond the vulnerable component itself, potentially compromising the broader application or system that utilizes the connector.

Root Cause

The root cause is improper access control within the MySQL Connector/J component. This type of vulnerability typically arises when authentication checks are insufficient, authorization decisions can be bypassed under certain conditions, or trust relationships between the connector and database servers are improperly validated. Given the scope change characteristic, the vulnerability likely allows an attacker to leverage the connector's privileges or trust relationships to impact connected systems.

Attack Vector

The attack vector is network-based, allowing remote exploitation without requiring local access to the target system. The attacker does not need any privileges or authentication to initiate the attack, though successful exploitation requires:

1. Network access to systems running vulnerable MySQL Connector/J versions
2. Human interaction from a legitimate user (such as initiating a connection)
3. Exploitation of the improper access control flaw during the connection or authentication process

The difficulty of exploitation is rated as high, meaning that reliable exploitation requires specific conditions, precise timing, or specialized knowledge. The vulnerability mechanism involves improper access control during database connectivity operations. When a Java application uses the vulnerable Connector/J versions to establish MySQL connections, an attacker with network access can potentially manipulate the connection process to gain unauthorized access. The specific technical details of the exploitation mechanism should be reviewed in the Oracle CPU October 2023 Security Alert.

Detection Methods for CVE-2023-22102

Indicators of Compromise

• Unexpected MySQL connection attempts to unknown or suspicious database servers
• Anomalous authentication patterns or connection parameter modifications in application logs
• Unusual network traffic patterns between Java applications and MySQL endpoints
• Evidence of connection string manipulation or injection attempts in application debugging logs

Detection Strategies

• Inventory all applications using MySQL Connector/J and verify version numbers against affected versions (8.1.0 and prior)
• Monitor Java application logs for suspicious database connection activities or authentication failures
• Implement network monitoring to detect connections to unauthorized MySQL server endpoints
• Review application configurations for hardcoded or improperly secured database connection parameters

Monitoring Recommendations

• Enable detailed logging for MySQL Connector/J connection activities in production environments
• Configure alerting for database connection anomalies, particularly connections to new or unrecognized endpoints
• Monitor for unusual patterns in JDBC connection establishment that could indicate exploitation attempts
• Integrate SentinelOne's runtime application protection to detect malicious activity in Java applications using MySQL connectors

How to Mitigate CVE-2023-22102

Immediate Actions Required

• Upgrade MySQL Connector/J to the latest patched version as specified in Oracle's security advisory
• Audit all Java applications for vulnerable Connector/J dependencies, including transitive dependencies
• Review and restrict network access between applications and database servers to minimize exposure
• Implement application-level input validation for database connection parameters

Patch Information

Oracle has addressed this vulnerability in their October 2023 Critical Patch Update (CPU). Organizations should apply the latest security patches from Oracle to remediate this vulnerability. Detailed patch information and affected version specifics are available in the Oracle CPU October 2023 Security Alert. For environments using NetApp OnCommand Insight, refer to the NetApp Security Advisory NTAP-20231027-0007 for product-specific guidance.

Workarounds

• Restrict network access to MySQL database servers using firewall rules to limit exposure to trusted networks only
• Implement strict connection string validation in application code to prevent connection parameter tampering
• Use network segmentation to isolate database connectivity traffic from general network access
• Consider implementing database connection proxies with additional authentication layers as an interim measure

# Configuration example - Verify MySQL Connector/J version in Maven projects
mvn dependency:tree | grep mysql-connector
# Expected output should show version higher than 8.1.0

# Check for vulnerable versions in Gradle projects
./gradlew dependencies | grep mysql-connector

# Update Maven dependency to patched version
# In pom.xml, update to latest secure version:
# <dependency>
#   <groupId>com.mysql</groupId>
#   <artifactId>mysql-connector-j</artifactId>
#   <version>8.2.0</version>  <!-- Use latest patched version -->
# </dependency>