Memory leak in BIG-IP DNS, GTM, and Link Controller
Priority LOW 21CWE-401Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-401.
Summary
In version 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, and 11.6.1-11.6.5.2 of BIG-IP DNS, GTM, and Link Controller, zxfrd leaks memory when listing DNS zones. Zones can be listed via TMSH, iControl or SNMP; only users with access to those services can trigger this vulnerability.
Why it matters now
EPSS 0.008 56th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | BIG-IP DNS, GTM, and Link Controller | 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 | — | No fix listed | CNA |
- BIG-IP DNS, GTM, and Link Controller Vendor— 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 Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* | 11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1 | Vulnerable | F5 |
| cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* | 11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1 | Vulnerable | F5 |
| cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* | 11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1 | Vulnerable | F5 |
- cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1 Vulnerable ·F5
- cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1 Vulnerable ·F5
- cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1 Vulnerable ·F5
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27725
- 2026-10-03 Alias added: GHSA-3f89-7rr5-pcr2
References
More F5 Big-ip Domain Name System vulnerabilities
- TI-2023-25230 BIG-IP Configuration utility unauthenticated remote code execution vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2022-01269 Missing authentication in F5 BIG-IP KEVCVSS 3.1CRITICAL 9.8
- TI-2021-05850 Memory corruption in BIG-IP KEVCVSS 3.1CRITICAL 9.8
- TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
- TI-2020-04820 Path traversal in BIG-IP KEVCVSS 3.1CRITICAL 9.8
- TI-2023-25231 BIG-IP Configuration utility authenticated SQL injection vulnerability KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2020-27725 · CVE Program
- CVE-2020-27725 · NVD
- FIRST EPSS
- GHSA-3f89-7rr5-pcr2 · GitHub Advisory Database · CC BY 4.0
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