Bug ID 812989: Queries with TSIG signatures not matching BIG-IP result in malformed BADSIG answer

Last Modified: May 29, 2024

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

Known Affected Versions:
14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 14.1.5,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,, 15.1.9,, 15.1.10,,,

Fixed In:

Opened: Aug 06, 2019

Severity: 3-Major


In certain circumstances, it is possible that queries to the BIG-IP system with a TSIG key name, which matches a TSIG key on the BIG-IP system, but carries a different signature, the the BIG-IP system responds with a malformed BADSIG answer


The BIG-IP system answers with a malformed BADSIG warning; this is an example from the dig command: ;; Warning: Message parser reports malformed message packet. ;; Couldn't verify signature: tsig indicates error.


-- Queries to the BIG-IP system are made with a TSIG key name matching a TSIG key on the BIG-IP system, -- The signature on the TSIG key differs.



Fix Information

Delete TSIG info after the TSIG error is detected and processed.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips