CVE-2018-5527

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-06-27 · updated 2026-06-17
Weakness: CWE-772

Description

On BIG-IP 13.1.0-13.1.0.7, a remote attacker using undisclosed methods against virtual servers configured with a Client SSL or Server SSL profile that has the SSL Forward Proxy feature enabled can force the Traffic Management Microkernel (tmm) to leak memory. As a result, system memory usage increases over time, which may eventually cause a decrease in performance or a system reboot due to memory exhaustion.

Affected products

F5 BIG-IP APM: from 13.0.0 through 13.1.0.7
BIG-IP: from 13.0.0 through 13.1.0.7
F5 Big-Ip Analytics: from 13.0.0 through 13.1.0.7
F5 Networks, Inc. BIG-IP (AAM): from 13.0.0 through 13.1.0.7
BIG-IP ASM: from 13.0.0 through 13.1.0.7
F5 BIG-IP DNS: from 13.0.0 through 13.1.0.7
F5 Big-Ip Edge Gateway: from 13.0.0 through 13.1.0.7
F5 Big-Ip Global Traffic Manager: from 13.0.0 through 13.1.0.7
F5 Big-Ip Link Controller: from 13.0.0 through 13.1.0.7
F5 BIG-IP (LTM): from 13.0.0 through 13.1.0.7
F5 Networks, Inc. BIG-IP (PEM): from 13.0.0 through 13.1.0.7
F5 Big-Ip Webaccelerator: from 13.0.0 through 13.1.0.7
F5 Big-Ip Websafe: from 13.0.0 through 13.1.0.7

References

Get alerted when CVE-2018-5527 or the next vulnerability affects your stack