CVE-2020-27725 : What You Need to Know
Learn about CVE-2020-27725 involving memory leakage in BIG-IP DNS, GTM, and Link Controller versions 11.6.1-11.6.5.2 to 15.1.0-15.1.0.5, potentially leading to a Denial of Service (DoS) attack. Find mitigation steps and preventive measures here.
This CVE involves memory leakage in BIG-IP DNS, GTM, and Link Controller versions 11.6.1-11.6.5.2, 12.1.0-12.1.5.2, 13.1.0-13.1.3.4, 14.1.0-14.1.3, and 15.1.0-15.1.0.5, potentially leading to a Denial of Service (DoS) attack.
Understanding CVE-2020-27725
This vulnerability allows unauthorized users to trigger a DoS attack by exploiting memory leakage in the listed versions of BIG-IP DNS, GTM, and Link Controller.
What is CVE-2020-27725?
In versions 11.6.1-11.6.5.2 to 15.1.0-15.1.0.5 of BIG-IP DNS, GTM, and Link Controller, a memory leakage issue occurs when listing DNS zones, potentially leading to a DoS attack.
The Impact of CVE-2020-27725
The vulnerability allows attackers to exhaust system memory, causing a DoS condition that disrupts services and potentially impacts system availability.
Technical Details of CVE-2020-27725
This section provides detailed technical insights into the CVE.
Vulnerability Description
The vulnerability in BIG-IP DNS, GTM, and Link Controller versions 11.6.1-11.6.5.2 to 15.1.0-15.1.0.5 allows unauthorized users to trigger a DoS attack by exploiting memory leakage when listing DNS zones.
Affected Systems and Versions
The following versions are affected:
- 15.1.0-15.1.0.5
- 14.1.0-14.1.3
- 13.1.0-13.1.3.4
- 12.1.0-12.1.5.2
- 11.6.1-11.6.5.2
Exploitation Mechanism
Attackers with access to services like TMSH, iControl, or SNMP can exploit the vulnerability by listing DNS zones, causing memory leakage and potentially leading to a DoS attack.
Mitigation and Prevention
Protect your systems from CVE-2020-27725 with the following measures:
Immediate Steps to Take
- Apply vendor-supplied patches promptly.
- Restrict access to services like TMSH, iControl, and SNMP.
- Monitor system resources for unusual memory consumption.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
- Conduct regular security assessments and audits to identify and address vulnerabilities.
Patching and Updates
Ensure timely installation of patches provided by the vendor to address the memory leakage vulnerability in BIG-IP DNS, GTM, and Link Controller versions 11.6.1-11.6.5.2 to 15.1.0-15.1.0.5.