CVE-2019-6594

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-02-26 · updated 2026-06-17
Weakness: CWE-835

Description

On BIG-IP 11.5.1-11.6.3.2, 12.1.3.4-12.1.3.7, 13.0.0 HF1-13.1.1.1, and 14.0.0-14.0.0.2, Multi-Path TCP (MPTCP) does not protect against multiple zero length DATA_FINs in the reassembly queue, which can lead to an infinite loop in some circumstances.

Affected products

F5 BIG-IP APM: from 11.5.3 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; from 11.5.1 through 11.6.3.2; from 13.0.0.1 through 13.1.1.1
BIG-IP: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 Big-Ip Analytics: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
BIG-IP ASM: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 BIG-IP DNS: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 Big-Ip Edge Gateway: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 Big-Ip Fraud Protection Service: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 Big-Ip Global Traffic Manager: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 Big-Ip Link Controller: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 BIG-IP (LTM): from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 Networks, Inc. BIG-IP (PEM): from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3
F5 Big-Ip Webaccelerator: from 11.5.1 through 11.6.3.2; from 12.1.3.4 through 12.1.3.7; from 13.0.1 through 13.1.1.1; from 14.0.0 through 14.0.0.2; 13.0.0-hf1, 13.0.0-hf2, 13.0.0-hf3

References

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