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

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.1 HF1, 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, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.5.4 HF2, 11.4.1, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

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

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips