CVE-2019-6637: F5 BIG-IP Application Security Manager

Medium severity, CVSS 6.5. EPSS: 1.5% chance of exploitation in the next 30 days.

On BIG-IP (ASM) 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.1.4, and 12.1.0-12.1.4, Application logic abuse of ASM REST endpoints can lead to instability of BIG-IP system. Exploitation of this issue causes excessive memory consumption which results in the Linux kernel triggering OOM killer on arbitrary processes. The attack requires an authenticated user with role of "Guest" or greater privilege. Note: "No Access" cannot login so technically it's a role but a user with this access role cannot perform the attack.

Affected products

• F5 BIG-IP Application Security Manager: from 12.1.0, before 12.1.4.1 (fixed in 12.1.4.1); from 13.0.0, before 13.1.1.5 (fixed in 13.1.1.5); from 14.0.0, before 14.0.0.5 (fixed in 14.0.0.5); from 14.1.0, before 14.1.0.6 (fixed in 14.1.0.6)

Published 2019-07-03. Last modified 2026-06-17.