CVE-2022-39135 : What You Need to Know

Apache Calcite 1.22.0 introduced the SQL operators EXISTS_NODE, EXTRACT_XML, XML_TRANSFORM, and EXTRACT_VALUE, making them vulnerable to potential XML External Entity (XXE) attacks. Learn more about this CVE, its impact, technical details, and mitigation steps.

Understanding CVE-2022-39135

Apache Calcite is affected by a vulnerability that allows for XML External Entity (XXE) attacks, exposing users to potential security risks.

What is CVE-2022-39135?

CVE-2022-39135 affects Apache Calcite versions 1.22.0 to less than 1.32.0, exposing certain SQL operators to XXE attacks by not restricting XML External Entity references in their configuration.

The Impact of CVE-2022-39135

This vulnerability could allow malicious actors to exploit the affected operators, potentially leading to sensitive data exposure or system compromise. Users running applications utilizing Oracle or MySQL dialects are particularly at risk.

Technical Details of CVE-2022-39135

Details regarding the vulnerability, affected systems, and exploitation methods.

Vulnerability Description

Apache Calcite versions between 1.22.0 and less than 1.32.0 do not properly restrict XML External Entity references in certain SQL operators, enabling attackers to execute XXE attacks. User execution context determines the extent of the vulnerability.

Affected Systems and Versions

Users of Apache Calcite version 1.22.0 to less than 1.32.0, utilizing operators like EXISTS_NODE, EXTRACT_XML, XML_TRANSFORM, and EXTRACT_VALUE, are vulnerable to XXE attacks.

Exploitation Mechanism

Malicious entities can exploit the vulnerability by injecting crafted XML payloads via the affected SQL operators, potentially leading to sensitive data disclosure.

Mitigation and Prevention

Actions to mitigate the impact of CVE-2022-39135 and prevent future occurrences.

Immediate Steps to Take

Users are advised to upgrade to Apache Calcite version 1.32.0 or newer, where Document Type Declarations and XML External Entity resolution are disabled on the impacted operators, effectively mitigating the vulnerability.

Long-Term Security Practices

Implementing secure coding practices and regular security audits can help prevent similar vulnerabilities and improve overall system security.

Patching and Updates

Regularly apply security patches and updates provided by Apache Software Foundation to ensure the latest security enhancements and fixes are in place.