CVE-2019-6631 Explained : Impact and Mitigation
Learn about CVE-2019-6631, a vulnerability in F5 BIG-IP versions 11.5.1-11.6.4 that could lead to service interruption due to improper HTTP header manipulation. Find mitigation steps and long-term security practices here.
A vulnerability in F5 BIG-IP versions 11.5.1-11.6.4 could lead to service interruption when iRules manipulate HTTP headers improperly.
Understanding CVE-2019-6631
This CVE involves a Denial of Service (DoS) risk due to HTTP header manipulation on affected F5 BIG-IP versions.
What is CVE-2019-6631?
The vulnerability arises when requests deviate from RFC standards during iRules-based HTTP header manipulation on BIG-IP 11.5.1-11.6.4, impacting traffic processed by a Virtual Server with an associated HTTP profile.
The Impact of CVE-2019-6631
The vulnerability could result in a service interruption on affected F5 BIG-IP versions, potentially leading to a Denial of Service (DoS) situation.
Technical Details of CVE-2019-6631
This section provides detailed technical insights into the CVE.
Vulnerability Description
Improper handling of HTTP header manipulation by iRules on F5 BIG-IP 11.5.1-11.6.4 can cause service disruption when processing traffic through a Virtual Server with an associated HTTP profile.
Affected Systems and Versions
- Product: BIG-IP
- Vendor: F5
- Versions: BIG-IP 11.5.1-11.6.4
Exploitation Mechanism
The vulnerability is exploited when iRules-based HTTP header manipulation encounters non-compliant requests, triggering service interruptions.
Mitigation and Prevention
Protecting systems from CVE-2019-6631 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply vendor-supplied patches promptly to mitigate the vulnerability.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch F5 BIG-IP systems to address known vulnerabilities.
- Implement network segmentation and access controls to limit the impact of potential attacks.
- Educate staff on best practices for secure configuration and usage of F5 BIG-IP devices.
- Stay informed about security advisories and updates from F5.
Patching and Updates
Regularly check for and apply patches released by F5 to address CVE-2019-6631 and other security vulnerabilities.