CVE-2020-27717
CVE-2020-27717 is a high-severity vulnerability in F5 Big-ip Domain Name System with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 7.8
- EPSS exploit prediction: 1% (60th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: F5 Big-ip Domain Name System
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2020-27717?
- 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.
- How severe is CVE-2020-27717?
- CVE-2020-27717 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2020-27717 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-27717?
- CVE-2020-27717 affects F5 Big-ip Domain Name System. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-27717?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-27717 published?
- CVE-2020-27717 was published on 2020-12-24 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
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