Bug ID 802873: Manual changes to policy imported as XML may introduce corruption for Login Pages

Last Modified: Sep 13, 2023

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,

Fixed In:
16.0.0, 15.1.4,

Opened: Jul 06, 2019

Severity: 3-Major


Manual changes to a policy imported as XML may introduce corruption for Response Pages. The following log appears: ASM subsystem error (asm_config_server.pl ,F5::PrepareConf::Policy::prepare_alternate_response_file_tbl): failed to parse response headers - please check response page.


The affected reponse page is not returned for traffic as expected, and an error is reported instead.


-- XML policy file is missing a response header. -- Import the policy.


Mitigation: Ensure that response_header exists in XML policy file before import. Workaround: Go to the affected policy's Response Pages: Login Page, click Save and then click Apply Policy.

Fix Information

The system now gracefully ignores empty header for Login Page response page.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips