The Apache Xalan Java XSLT library is vulnerable to an integer truncation issue when processing malicious XSLT stylesheets. This vulnerability allows attackers to corrupt Java class files generated by the internal XSLTC compiler and execute arbitrary Java bytecode. With a CVSS score of 7.5, this vulnerability is classified as high severity, indicating a significant risk to organizations. Given the potential for arbitrary code execution, organizations should prioritize patching immediately.
The vulnerability was published on July 19, 2022, and is known to impact various components, including Apache Xalan, OpenJDK, and Oracle JDK versions before specific patches. Users are recommended to update to version 2.7.3 or later. Notably, Java runtimes such as OpenJDK include repackaged copies of Xalan, which means that systems relying on these runtimes are also at risk.
As of now, there is no public exploit confirmed for this vulnerability. However, given its nature and the existence of proof-of-concept (PoC) code in the GitHub repositories, organizations should remain vigilant and apply necessary updates to mitigate potential risks.
Risk to organizations includes unauthorized access and potential data breaches due to the execution of arbitrary bytecode. Organizations should assess their exposure to this vulnerability and take action accordingly.
In conclusion, the Apache Xalan Java vulnerability CVE-2022-34169 presents a serious risk to Java applications. Immediate steps to patch affected systems are essential to protect against possible exploitation.
Vulnerability Details
The Apache Xalan Java XSLT library is vulnerable to an integer truncation issue when processing malicious XSLT stylesheets. This can be used to corrupt Java class files generated by the internal XSLTC compiler and execute arbitrary Java bytecode. The CVSS score for this vulnerability is 7.5, categorized as high severity. The vulnerability affects Apache Xalan Java versions prior to 2.7.3.
Technical Analysis
The root cause of this vulnerability stems from an integer truncation issue that occurs during the processing of malicious XSLT stylesheets. The attack vector for this vulnerability is network-based, with low complexity and no privileges required for exploitation. User interaction is not needed, making it easier for an attacker to exploit this vulnerability remotely.
Risk & Impact Analysis
Organizations utilizing the affected versions of Apache Xalan Java are exposed to significant risks, including unauthorized execution of arbitrary Java bytecode. The potential impact on confidentiality is none, while integrity is rated high due to the possibility of malicious code execution. Given the nature of this vulnerability, the urgency for organizations to address it is high, as failure to do so can lead to severe operational impacts.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of Apache Xalan Java prior to 2.7.3. Additionally, it impacts Java runtimes, including OpenJDK, which may include repackaged copies of Xalan.
Mitigation & Remediation
Organizations should ensure that they update their Apache Xalan Java libraries to version 2.7.3 or later. If immediate patching is not possible, consider implementing configuration hardening measures and network controls to restrict access to vulnerable components.
For further security assessments, organizations may utilize services related to penetration testing to identify and remediate any vulnerabilities present.
Detection Guidance
Organizations should monitor logs for anomalies related to the execution of Java bytecode and any unusual activity linked to the processing of XSLT stylesheets. Behavioral indicators may include unexpected application crashes or unauthorized modifications to Java class files.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-34169 highlights the importance of maintaining robust security practices around Java libraries. As vulnerabilities in widely used libraries can have a far-reaching impact, organizations must implement comprehensive security assessments and maintain awareness of emerging threats.
For guidance on vulnerability management programs, organizations can refer to the vulnerability management program to ensure they are effectively identifying and mitigating vulnerabilities.
Additionally, organizations may benefit from understanding the trends in vulnerability exposure as discussed in the 2025 vulnerability exposure severity trends report.
Finally, organizations should consider adopting a proactive approach to security through continuous monitoring and validation of security measures, as outlined in the penetration testing methodology to stay ahead of potential threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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