Bug ID 1921085: Core file generated when using FTP::ftps_mode require without SSL profile in TCP filter

Last Modified: Jun 28, 2025

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

Known Affected Versions:
16.0.0, 16.0.0.1, 16.0.1, 16.0.1.1, 16.0.1.2, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 17.0.0, 17.0.0.1, 17.0.0.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2, 17.5.0, 17.5.1

Opened: Apr 04, 2025

Severity: 2-Critical

Symptoms

Tmm crashes while passing ftp traffic.

Impact

Traffic disrupted while tmm restarts.

Conditions

1. create a FTP virtual without SSL profile. 2. create a iRule to force FTP::ftps_mode require in FTP profile like when CLIENT_ACCEPTED { FTP::ftps_mode require } 3. Attempt FTP transfer via FTP virtual created.

Workaround

Attach appropriate SSL profile to the FTP virtual.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips