Bug ID 1287313: SIP response message with missing Reason-Phrase or with spaces are not accepted

Last Modified: Feb 15, 2024

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

Fixed In:
17.1.1, 16.1.4, 15.1.10

Opened: Apr 11, 2023

Severity: 3-Major

Symptoms

BIG-IP drops SIP response messages that are missing the Reason-Phrase.

Impact

Connectivity issue.

Conditions

A SIP response message in this format SIP/2.0 424 \r\n are dropped If the message has a reason text Status-Line = SIP-Version SP Status-Code SP Reason-Phrase CRLF Like this SIP/2.0 404 Not Found\r\n then it would not be dropped

Workaround

None

Fix Information

BIG-IP now accepts SIP response with Status-line missing a reason text.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips