What’s Vulnerable › Vulnerabilities

CVE-2018-5538

• Severity: low (CVSS 3.7 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-07-25 · updated 2026-06-17

Description

On F5 BIG-IP DNS 13.1.0-13.1.0.7, 12.1.3-12.1.3.5, DNS Express / DNS Zones accept NOTIFY messages on the management interface from source IP addresses not listed in the 'Allow NOTIFY From' configuration parameter when the db variable "dnsexpress.notifyport" is set to any value other than the default of "0".

Affected products

• F5 BIG-IP DNS: from 12.1.3 through 12.1.3.5; from 13.1.0 (excl.) through 13.1.0.7
• F5 Big-Ip Global Traffic Manager: from 12.1.3 through 12.1.3.5; from 13.1.0 through 13.1.0.7
• F5 Big-Ip Link Controller: from 12.1.3 through 12.1.3.5; from 13.1.0 through 13.1.0.7
• F5 BIG-IP (LTM): from 12.1.3 through 12.1.3.5; from 13.1.0 through 13.1.0.7

References

• https://support.f5.com/csp/article/K45435121
• https://support.f5.com/csp/article/K45435121

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