CVE-2019-6683 : Security Advisory and Response
Learn about CVE-2019-6683 affecting BIG-IP Virtual Edition versions 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.2, 12.1.0-12.1.5, and 11.5.2-11.6.5.1. Find out how to mitigate the risk and prevent potential DoS attacks.
This CVE involves potential high flow usage risk on BIG-IP Virtual Edition versions 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.2, 12.1.0-12.1.5, and 11.5.2-11.6.5.1 when Loose Initiation is enabled on a FastL4 profile.
Understanding CVE-2019-6683
This vulnerability can lead to excessive flow usage under undisclosed conditions, potentially impacting the availability of BIG-IP virtual servers.
What is CVE-2019-6683?
The vulnerability in BIG-IP Virtual Edition versions mentioned can result in high flow usage when Loose Initiation is activated on a FastL4 profile.
The Impact of CVE-2019-6683
The risk of high flow usage can potentially lead to a Denial of Service (DoS) condition, affecting the performance and availability of the affected servers.
Technical Details of CVE-2019-6683
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The vulnerability affects BIG-IP Virtual Edition versions 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.2, 12.1.0-12.1.5, and 11.5.2-11.6.5.1 when Loose Initiation is enabled on a FastL4 profile, leading to potential high flow usage.
Affected Systems and Versions
- BIG-IP Virtual Edition 15.0.0-15.0.1.1
- BIG-IP Virtual Edition 14.1.0-14.1.2.2
- BIG-IP Virtual Edition 14.0.0-14.0.1
- BIG-IP Virtual Edition 13.1.0-13.1.3.2
- BIG-IP Virtual Edition 12.1.0-12.1.5
- BIG-IP Virtual Edition 11.5.2-11.6.5.1
Exploitation Mechanism
The circumstances triggering the excessive flow usage have not been disclosed, leaving the specific exploitation mechanism undisclosed.
Mitigation and Prevention
Protecting systems from this vulnerability requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable Loose Initiation on FastL4 profiles on affected versions of BIG-IP Virtual Edition.
- Monitor network traffic for any signs of abnormal flow usage.
Long-Term Security Practices
- Regularly update and patch BIG-IP Virtual Edition to the latest versions.
- Implement network monitoring and intrusion detection systems to detect and mitigate potential DoS attacks.
Patching and Updates
- Apply patches provided by F5 to address the vulnerability on affected versions of BIG-IP Virtual Edition.