Bug ID 1110205: SSL::collect in CLIENTSSL_DATA prevents orderly connection shutdown

Last Modified: May 29, 2024

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
17.1.0, 17.0.0, 16.1.2.2, 16.1.2.1, 16.1.2, 15.1.8, 15.1.7, 15.1.6.1, 15.1.6, 15.1.5.1, 15.1.5, 15.1.4.1

Fixed In:
17.1.0, 16.1.3.1, 15.1.9

Opened: May 27, 2022

Severity: 2-Critical

Symptoms

If a virtual server has an iRule performing SSL payload processing in CLIENTSSL_DATA, TMM fails to process or forward an ingress TCP FIN from a client, leaving the connection in a zombie state until it eventually idles out.

Impact

Unexpected growth in the number of connections idling on a virtual server leads to memory pressure.

Conditions

The issue occurs only when SSL::collect is used in CLIENTSSL_DATA when CLIENTSSL_DATA { log local0. "." SSL::release SSL::collect }

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips