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CVE-2016-6876

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;…

Severity
High 7.5
Published
7 Sept 2016
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.6% in the next 30 daysHigher than 75% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-399
Attack
Over the network · No login needed · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

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.

From NVD.

Affected software

SoftwareAffected versions
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_access_policy_manager
  • Version 12.0.0
  • Version 11.6.0
  • Version 11.5.4
  • Version 11.5.3
All 14 release lines
  • Version 10.2.1
  • Version 10.2.2
  • Version 10.2.3
  • Version 10.2.4
  • Version 11.2.1
  • Version 11.4.0
  • Version 11.4.1
  • Version 11.5.0
  • Version 11.5.1
  • Version 11.5.2
  • Version 11.5.3
  • Version 11.5.4
  • Version 11.6.0
  • Version 12.0.0
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_local_traffic_manager
  • Version 12.0.0
  • Version 11.6.0
  • Version 11.5.4
  • Version 11.5.3
All 14 release lines
  • Version 10.2.1
  • Version 10.2.2
  • Version 10.2.3
  • Version 10.2.4
  • Version 11.2.1
  • Version 11.4.0
  • Version 11.4.1
  • Version 11.5.0
  • Version 11.5.1
  • Version 11.5.2
  • Version 11.5.3
  • Version 11.5.4
  • Version 11.6.0
  • Version 12.0.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-6876
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-6876