Bug ID 563727: Issue a Body in Get sub violation for GET request with 'transfer-encoding: chunked'

Last Modified: Sep 13, 2023

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

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.1.3, 12.1.0

Opened: Dec 18, 2015

Severity: 3-Major

Symptoms

A GET request without payload but with payload indication doesn't issue the body in get violation.

Impact

A suspicious request goes by undetected.

Conditions

A Get request without payload arrives. The request has a 'transfer-encoding: chunked' header although there is no payload.

Workaround

Add an iRule that removes this header from the ASM and issues a custom violation.

Fix Information

A GET request without payload but with 'transfer-encoding: chunked' will issue the body in GET sub violation.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips