What’s Vulnerable › Vulnerabilities

CVE-2016-6876

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-09-07 · updated 2026-06-17
• Weakness: CWE-399

Description

The RESOLV::lookup iRule command in F5 BIG-IP LTM, APM, ASM, and Link Controller 10.2.1 through 10.2.4, 11.2.1, 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.0.0 before HF3; BIG-IP AAM, AFM, and PEM 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.0.0 before HF3; BIG-IP Analytics 11.2.1, 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.0.0 before HF3; BIG-IP DNS 12.0.0 before HF3; BIG-IP Edge Gateway, WebAccelerator, and WOM 10.2.1 through 10.2.4 and 11.2.1; BIG-IP GTM 10.2.1 through 10.2.4, 11.2.1, 11.4.x, 11.5.x before 11.5.4 HF2, and 11.6.x before 11.6.1; and BIG-IP PSM 10.2.1 through 10.2.4 and 11.4.0 through 11.4.1 allows remote DNS servers to cause a denial of service (CPU consumption or Traffic Management Microkernel crash) via a crafted PTR response.

Affected products

• F5 BIG-IP APM: 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.2.1, 11.4.0 (+8)
• BIG-IP: 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+3)
• F5 Big-Ip Analytics: 11.2.1, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2 (+4)
• F5 Networks, Inc. BIG-IP (AAM): 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+3)
• BIG-IP ASM: 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.2.1, 11.4.0 (+8)
• F5 BIG-IP DNS: 12.0.0
• F5 Big-Ip Edge Gateway: 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.2.1
• F5 Big-Ip Global Traffic Manager: 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.2.1, 11.4.0 (+7)
• F5 Big-Ip Link Controller: 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.2.1, 11.4.0 (+8)
• F5 BIG-IP (LTM): 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.2.1, 11.4.0 (+8)
• F5 Networks, Inc. BIG-IP (PEM): 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+3)
• F5 Big-Ip Protocol Security Module: 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.4.0, 11.4.1
• F5 Big-Ip Wan Optimization Manager: 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.2.1
• F5 Big-Ip Webaccelerator: 10.2.1, 10.2.2, 10.2.3, 10.2.4, 11.2.1

References

• http://www.securitytracker.com/id/1036725
• https://support.f5.com/kb/en-us/solutions/public/k/52/sol52638558.html
• http://www.securitytracker.com/id/1036725
• https://support.f5.com/kb/en-us/solutions/public/k/52/sol52638558.html

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