On BIG-IP 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, 12.1.0-12.1.4, 11.6.1-11.6.3.4, and 11.5.2-11.5.8, DNS query TCP connections that are aborted b…

published 2019-05-03 7y ago modified 2026-06-17 4mo ago also EUVD-2019-16171

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

On BIG-IP 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, 12.1.0-12.1.4, 11.6.1-11.6.3.4, and 11.5.2-11.5.8, DNS query TCP connections that are aborted before receiving a response from a DNS cache may cause TMM to restart.

Patch / fix

fixed in 9

f5 big-ip_access_policy_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
f5 big-ip_advanced_firewall_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
f5 big-ip_application_acceleration_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
f5 big-ip_link_controller 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
f5 big-ip_policy_enforcement_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
f5 big-ip_application_security_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
f5 big-ip_local_traffic_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
f5 big-ip_global_traffic_manager 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2
f5 big-ip_domain_name_system 11.5.9, 11.6.4, 12.1.4.1, 13.1.1.5, 14.1.0.2

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Exploit prediction

1.77% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

F5 BIG-IP (LTM, AAM, AFM, APM, ASM, DNS, GTM, Link Controller, PEM)

References

support.f5.com /csp/article/K24401914
vendor-advisory
securityfocus.com /bid/108295
vdb-entry, broken-link, third-party-advisory

Sources

CVE List CVE-2019-6612
NVD CVE-2019-6612

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