CVE-2019-19330 : What You Need to Know
Learn about CVE-2019-19330, a vulnerability in HAProxy versions before 2.0.10 allowing improper handling of headers, leading to Intermediary Encapsulation Attacks. Find out how to mitigate and prevent potential exploitation.
HAProxy versions prior to 2.0.10 have a flaw in their HTTP/2 implementation that can be exploited through certain characters, leading to Intermediary Encapsulation Attacks.
Understanding CVE-2019-19330
This CVE involves a vulnerability in HAProxy versions before 2.0.10 related to the handling of headers in the HTTP/2 implementation.
What is CVE-2019-19330?
The vulnerability in HAProxy versions prior to 2.0.10 allows improper handling of headers, which can be exploited using specific characters like carriage return (CR), line feed (LF), and the zero character (NUL), known as Intermediary Encapsulation Attacks.
The Impact of CVE-2019-19330
- Attackers can exploit this vulnerability to potentially manipulate headers and compromise the security of affected systems.
- This could lead to unauthorized access, data leakage, or other malicious activities.
Technical Details of CVE-2019-19330
HAProxy's HTTP/2 implementation vulnerability has the following technical aspects:
Vulnerability Description
The flaw in HAProxy versions before 2.0.10 mishandles headers, allowing for Intermediary Encapsulation Attacks using specific characters.
Affected Systems and Versions
- Product: HAProxy
- Vendor: N/A
- Versions affected: Versions prior to 2.0.10
Exploitation Mechanism
- Exploitation involves the use of characters like CR, LF, and NUL to manipulate headers and potentially compromise systems.
Mitigation and Prevention
To address CVE-2019-19330, consider the following mitigation strategies:
Immediate Steps to Take
- Update HAProxy to version 2.0.10 or newer to mitigate the vulnerability.
- Monitor and restrict network traffic to detect and prevent potential exploitation attempts.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security advisories and promptly apply patches released by HAProxy to address vulnerabilities.