An XML External Entity (XXE) vulnerability exists in the Ambari/Oozie project, allowing an attacker to inject malicious XML entities. This vulnerability occurs due to insecure parsing of XML input using the `DocumentBuilderFactory` class without disabling external entity resolution. An attacker can exploit this vulnerability to read arbitrary files on the server or perform server-side request forgery (SSRF) attacks. The issue has been fixed in both Ambari 2.7.9 and the trunk branch.
With a CVSS score of 7.5, this vulnerability is classified as high severity. Risk to organizations includes potential unauthorized access to sensitive information and the ability to perform SSRF attacks, which could lead to further exploitation of internal services.
Currently, there are no known exploits in the wild, but the nature of the vulnerability emphasizes the need for immediate attention. Organizations should prioritize patching immediately to mitigate risks.
The vulnerability was published on January 21, 2025, and has been categorized under CWE-611. This classification indicates the potential for XML External Entity Injection, which is a common issue in applications that process XML input without rigorous validation.
The vulnerability affects all versions of Apache Ambari prior to version 2.7.9. Organizations running affected versions should take immediate steps to upgrade to the patched versions.
Vulnerability Details
An XML External Entity (XXE) vulnerability exists in the Ambari/Oozie project. The vulnerability arises from insecure parsing of XML input using the `DocumentBuilderFactory` class without disabling external entity resolution. As a result, attackers can inject malicious XML entities.
This vulnerability has a CVSS 3.1 score of 7.5, indicating high severity. The attack vector is network-based, with low complexity, no privileges required, and no user interaction needed. The confidentiality impact is high, while integrity and availability impacts are none.
Technical Analysis
The root cause of this vulnerability is the insecure handling of XML inputs. By failing to disable external entity resolution, the application inadvertently allows attackers to read sensitive files from the server or to initiate SSRF attacks.
The attack vector for this vulnerability is network-based, meaning that attackers can exploit it remotely. The complexity of the attack is low, as no special privileges or user interaction is required. As a result, the vulnerability poses a significant risk to any organization using vulnerable versions of Apache Ambari.
Risk & Impact Analysis
The real-world risk of this vulnerability is substantial, as attackers can exploit the XXE flaw to access sensitive data or potentially pivot to other internal services. This can lead to a broader compromise of the organization's network and critical infrastructure.
Organizations must assess the potential blast radius if this vulnerability is exploited, particularly in environments where sensitive data is processed. The urgency for addressing this vulnerability is high, given that it has been classified as high severity with a CVSS score of 7.5.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of Apache Ambari prior to version 2.7.9. Organizations should ensure that they upgrade to this version or later to mitigate the risk.
Mitigation & Remediation
Organizations should prioritize patching to the latest version of Apache Ambari. Specifically, upgrading to version 2.7.9 or later is crucial to eliminate this vulnerability.
If immediate patching is not possible, organizations can implement workarounds by disabling external entity resolution in XML parsers wherever applicable.
Additionally, organizations should consider employing network controls to restrict access to sensitive resources and monitor for any suspicious activities that may indicate an attempt to exploit this vulnerability.
Continuous penetration testing can also aid in identifying vulnerabilities and ensuring compliance with security policies.
Detection Guidance
Organizations should monitor logs for any unusual access patterns or unauthorized file reads that may indicate an exploitation attempt of this vulnerability.
Behavioral anomalies, such as unexpected outbound requests or file access, should also be logged and analyzed.
AppSecure Threat Intelligence Insight
The XXE vulnerability in Apache Ambari highlights the importance of secure XML processing practices. Security teams should ensure proper configuration and validation when handling XML data to prevent such vulnerabilities.
Organizations should take this incident as a lesson to strengthen their application security posture, focusing on input validation and secure coding practices.
For further reading on effective security practices, consider reviewing our penetration testing methodology and other resources to enhance your security strategies.
Conclusion
In conclusion, the XXE vulnerability in Apache Ambari presents significant risks that organizations must address promptly. By prioritizing patching and implementing robust security measures, organizations can mitigate the risks associated with this vulnerability.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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