CVE-2018-5507 : Vulnerability Insights and Analysis
Learn about CVE-2018-5507 affecting F5 BIG-IP versions 13.0.0, 12.1.0-12.1.3.1, 11.6.1-11.6.2, or 11.5.1-11.5.5, causing decryption issues in SSL sessions with small MTU size. Find mitigation steps and prevention measures.
F5 BIG-IP versions 13.0.0, 12.1.0-12.1.3.1, 11.6.1-11.6.2, or 11.5.1-11.5.5 have a vulnerability that affects vCMP guests on specific VIPRION series blades, leading to decryption issues in SSL sessions with small MTU size.
Understanding CVE-2018-5507
This CVE involves a vulnerability in F5 BIG-IP versions that impacts the decryption capability of vCMP guests on certain hardware.
What is CVE-2018-5507?
The vulnerability in F5 BIG-IP versions 13.0.0, 12.1.0-12.1.3.1, 11.6.1-11.6.2, or 11.5.1-11.5.5 causes vCMP guests on VIPRION 2100, 4200, and 4300 series blades to be unable to correctly decrypt data from SSL sessions with small MTU size.
The Impact of CVE-2018-5507
The vulnerability can result in a Denial of Service (DoS) condition due to the inability to decrypt data in SSL sessions.
Technical Details of CVE-2018-5507
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The issue affects F5 BIG-IP versions, causing vCMP guests on specific VIPRION series blades to have decryption problems in SSL sessions with small MTU size.
Affected Systems and Versions
- Affected Versions: 13.0.0, 12.1.0-12.1.3.1, 11.6.1-11.6.2, 11.5.1-11.5.5
- Affected Systems: VIPRION 2100, 4200, and 4300 series blades
Exploitation Mechanism
The vulnerability can be exploited by sending specially crafted SSL traffic with small MTU size to trigger the decryption issue in vCMP guests.
Mitigation and Prevention
To address CVE-2018-5507, follow these mitigation strategies:
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor network traffic for any signs of exploitation.
- Implement network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly update and patch F5 BIG-IP devices to prevent vulnerabilities.
- Conduct security assessments and audits to identify and address any weaknesses.
Patching and Updates
- Install the latest patches and updates from F5 Networks to mitigate the vulnerability effectively.