Cloud Vulnerability DB
A community-led vulnerabilities database
Vulnerability DatabaseCVE-2020-27721
CVE-2020-27721:
F5 BIG-IP Virtual Edition vulnerability analysis and mitigation
Overview
CVE-2020-27721 affects BIG-IP DNS/BIG-IP LTM GSLB deployment systems in versions 16.0.0-16.0.0.1, 15.1.0-15.1.1, 14.1.0-14.1.3, 13.1.0-13.1.3.5, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2. The vulnerability was discovered and disclosed in December 2020 (NVD).
Technical details
Under certain circumstances, the BIG-IP DNS system may stop using a BIG-IP LTM virtual server for DNS response. The vulnerability has been assigned a CVSS v3.1 Base Score of 7.5 (HIGH) with a vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (NVD).
Impact
The vulnerability primarily affects system availability, as it can cause the BIG-IP DNS system to stop using a BIG-IP LTM virtual server for DNS responses, potentially disrupting DNS services (NVD).
Exploitability
The vulnerability can be exploited remotely with low attack complexity and requires no privileges or user interaction (NVD).
Mitigation and workarounds
F5 has released patched versions to address this vulnerability. Users should upgrade to the appropriate fixed version for their installation (F5 Advisory).
Additional resources
Source: This report was generated using AI
Related F5 BIG-IP Virtual Edition vulnerabilities:
Free Vulnerability Assessment
Benchmark your Cloud Security Posture
Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.
Additional Wiz resources
Get a personalized demo
Ready to see Wiz in action?
"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management