CVE-2019-16771 Explained : Impact and Mitigation
Learn about CVE-2019-16771 affecting Armeria versions 0.85.0 to 0.96.0. Understand the impact, exploitation mechanism, and mitigation steps for this HTTP response splitting vulnerability.
Armeria versions starting from 0.85.0 up to and including 0.96.0 have a security vulnerability regarding HTTP response splitting. This allows attackers to insert arbitrary HTTP headers by using CRLF sequences when unfiltered data is used for populating the response headers. The issue has been resolved in version 0.97.0. Possible consequences of this vulnerability include defacement across different users, cache manipulation, Cross-Site Scripting (XSS), and page takeover.
Understanding CVE-2019-16771
Armeria has a vulnerability that allows remote attackers to inject arbitrary HTTP headers via CRLF sequences when unsanitized data is used to populate the headers of an HTTP response.
What is CVE-2019-16771?
CVE-2019-16771 is a vulnerability in Armeria versions 0.85.0 through 0.96.0 that enables HTTP response splitting, potentially leading to various security risks.
The Impact of CVE-2019-16771
- Attackers can perform cross-user defacement and page hijacking.
- Cache poisoning and Cross-Site Scripting (XSS) attacks are possible.
Technical Details of CVE-2019-16771
Armeria's vulnerability allows for the injection of arbitrary HTTP headers, posing risks to affected systems.
Vulnerability Description
The vulnerability in Armeria versions 0.85.0 to 0.96.0 permits attackers to manipulate HTTP headers using CRLF sequences.
Affected Systems and Versions
- Product: Armeria
- Vendor: LINE
- Versions Affected: < 0.97.0
Exploitation Mechanism
Attackers exploit unfiltered data to insert malicious HTTP headers, impacting the integrity and security of the HTTP response.
Mitigation and Prevention
To address CVE-2019-16771, immediate actions and long-term security practices are essential.
Immediate Steps to Take
- Update Armeria to version 0.97.0 or higher to mitigate the vulnerability.
- Implement input validation to sanitize data used in HTTP response headers.
Long-Term Security Practices
- Regularly monitor and update software components to address security vulnerabilities.
- Educate developers on secure coding practices to prevent similar issues in the future.
Patching and Updates
- Stay informed about security advisories and apply patches promptly to secure systems.