CVE-2021-23463 : Security Advisory and Response
Learn about the XML External Entity (XXE) Injection vulnerability in CVE-2021-23463 affecting com.h2database:h2 versions 1.4.198 to 2.0.202. Understand the impact, exploitation, and mitigation strategies.
A detailed overview of CVE-2021-23463 focusing on XML External Entity (XXE) Injection vulnerability in com.h2database:h2.
Understanding CVE-2021-23463
This section delves into the specifics of the XML External Entity (XXE) Injection vulnerability and its potential impact.
What is CVE-2021-23463?
The XML External Entity (XXE) Injection vulnerability affects the package com.h2database:h2 versions 1.4.198 to 2.0.202. It can be exploited via the org.h2.jdbc.JdbcSQLXML class object when receiving parsed string data from org.h2.jdbc.JdbcResultSet.getSQLXML() method.
The Impact of CVE-2021-23463
This vulnerability allows threat actors to trigger XML External Entity (XXE) attacks, leading to data leakage, server-side request forgery (SSRF), and potential denial of service (DoS) attacks.
Technical Details of CVE-2021-23463
Explore the vulnerability description, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The vulnerability arises when the getSource() method is executed with the parameter as DOMSource.class, resulting in the XXE Injection.
Affected Systems and Versions
The vulnerability affects com.h2database:h2 versions from 1.4.198 to 2.0.202.
Exploitation Mechanism
By manipulating XML input, threat actors can exploit this vulnerability to execute XXE attacks and potentially access sensitive data.
Mitigation and Prevention
Discover the immediate steps to secure your systems and establish long-term security practices.
Immediate Steps to Take
- Update the com.h2database:h2 package to versions beyond 2.0.202 to mitigate the vulnerability.
- Implement input validation and sanitize user-controlled data to prevent XXE attacks.
Long-Term Security Practices
Develop robust security policies, conduct regular security audits, and educate developers on secure coding practices to prevent future vulnerabilities.
Patching and Updates
Stay informed about security updates for com.h2database:h2 and promptly apply patches to address known vulnerabilities.