Last Modified: Aug 19, 2026
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.6.1, 11.6.1 hf1, 11.6.1 hf2, 11.6.2, 11.6.2 hf1, 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, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6
Fixed In:
13.0.0, 11.6.3
Opened: Oct 20, 2016 Severity: 2-Critical
When used an iRule to access a SIP header attribute with no value, TMM cores.
Traffic disrupted while tmm restarts.
Use iRule to access the value of SIP message header attribute with no value. Eg: "Supported: " IEOL "Session-Expires:" IEOL
No Workaround.
Fix includes adjusting the buffer offset properly to handle the empty header attributes while parsing the SIP message.