CVE-2019-17554 : Exploit Details and Defense Strategies
Learn about CVE-2019-17554 affecting Apache Olingo versions 4.0.0 to 4.6.0. Understand the XXE vulnerability, its impact, and mitigation steps to secure your systems.
Apache Olingo versions 4.0.0 to 4.6.0 have a vulnerability in their XML content type entity deserializer, potentially allowing for XXE attacks.
Understanding CVE-2019-17554
Apache Olingo versions 4.0.0 to 4.6.0 are susceptible to XML External Entity resolution attacks due to improper configuration of the deserializer.
What is CVE-2019-17554?
The vulnerability in Apache Olingo versions 4.0.0 to 4.6.0 allows for the resolution of external entities when processing XML content, creating a potential security risk for XXE attacks.
The Impact of CVE-2019-17554
This vulnerability could be exploited by malicious actors to launch XXE attacks, potentially leading to unauthorized access to sensitive information or server-side request forgery.
Technical Details of CVE-2019-17554
Apache Olingo versions 4.0.0 to 4.6.0 are affected by a vulnerability related to XML content type entity deserialization.
Vulnerability Description
The XML content type entity deserializer in Apache Olingo versions 4.0.0 to 4.6.0 is not properly configured to prevent the resolution of external entities, making it susceptible to XXE attacks.
Affected Systems and Versions
- Product: Olingo
- Vendor: Apache
- Versions: 4.0.0 to 4.6.0
Exploitation Mechanism
- Attackers can exploit this vulnerability by sending a request with the content type "application/xml" to trigger the deserialization of entities, potentially leading to XXE attacks.
Mitigation and Prevention
Immediate Steps to Take:
- Update Apache Olingo to a patched version that addresses the vulnerability.
- Implement strict input validation to prevent malicious XML payloads.
Long-Term Security Practices:
- Regularly monitor and audit XML processing functionalities for security vulnerabilities.
- Educate developers on secure coding practices to prevent XXE vulnerabilities.
- Consider implementing WAF or XML firewall to block malicious XML payloads.
Patching and Updates
Ensure that Apache Olingo is updated to a version that includes a fix for CVE-2019-17554.