Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP vCMP
Known Affected Versions:
11.5.4, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.5.5, 11.5.6, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5
Fixed In:
13.1.0, 13.0.0, 12.1.3.6, 11.5.7
Opened: Jul 15, 2016 Severity: 3-Major
On a vCMP guest, after a ePVA-enabled virtual server enters SYN Cookie mode, the FPGA will never leave SYN Cookie mode even though BIG-IP has returned to normal mode.
Since this occurs very intermittently, the entire impact is not known. Initially this is an incorrect SYN Cookie status reporting issue for LTM Virtual statistics, but it is possible that if SYN Cookie mode is triggered again, hardware SYN might not be enabled properly.
This occurs intermittently on virtual servers with ePVA enabled on a vCMP instance where SYN Protection is triggered.
Upgrade with new fixes for this.
BIG-IP FPGAs now correctly report hardware SYN Cookie mode.