Bug ID 1302689: ASM requests to rechunk payload

Last Modified: Feb 13, 2024

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

Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3

Fixed In:
17.1.1, 15.1.10

Opened: May 28, 2023

Severity: 3-Major

Symptoms

ASM requests TMM to rechunk payload in following scenarios: - Content-Length header was not found on response headers. - Response with headers only.

Impact

Transfer-Encoding: chunked header is added to the response.

Conditions

Content-Length header is missing from the HTTP response.

Workaround

None

Fix Information

On "Fixed" versions, create an internal ASM parameter as "is_disable_rechunk" below and restart ASM service, which would then stop tagging "Transfer Encoding: Chunked" in the Response header.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips