What’s Vulnerable › Vulnerabilities
CVE-2020-27717
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-12-24 · updated 2026-06-17
Description
On BIG-IP DNS 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, and 12.1.0-12.1.5.2, undisclosed series of DNS requests may cause TMM to restart and generate a core file.
Affected products
- F5 BIG-IP DNS: from 12.1.0 through 12.1.5; from 13.1.0 before 13.1.3.5; from 14.1.0 before 14.1.3.1; from 15.0.0 before 15.1.1; from 16.0.0 before 16.0.1 — fixed in 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1
How to fix
Upgrade to a fixed version: F5 BIG-IP DNS 13.1.3.5, 14.1.3.1, 15.1.1, 16.0.1. Check the vendor advisory for mitigations.
References
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