Bug ID 550434: Diameter connection may stall if server closes connection before CER/CEA handshake completes

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.5.4 HF2, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4

Fixed In:
12.1.0, 12.1.0, 11.6.1 HF1, 11.5.4 HF3, 11.4.1 HF10

Opened: Oct 05, 2015
Severity: 3-Major

Symptoms

Serverside connection stalls. Connection is not torn down and packets are not forwarded to serverside.

Impact

Connection stalls until handshake timeout and then it is reset.

Conditions

Selected pool member closes (via FIN) connection before sending CEA as part of Diameter handshake.

Workaround

none

Fix Information

Serverside diameter connections will be immediately reset if FIN is received before CEA (Capabilities-Exchange-Answer).

Behavior Change