Bug ID 531761: Web navigation flow may be reset when main page responds with non-HTML content

Last Modified: Oct 07, 2023

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

Known Affected Versions:
11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.1.0, 12.0.0, 11.6.0 HF6

Opened: Jul 03, 2015

Severity: 3-Major

Symptoms

In some web applications, the navigation flow may break (connection reset) if a main URL (login page, for example) is responding with a content that is not an HTML one, or if the response is dynamic, and occasionally not an HTML one.

Impact

Users may experience a connection reset while navigating through the website, usually after several minutes.

Conditions

Proactive Bot Defense is enabled on a DOS profile that is attached to a Virtual Server, and one of the main URLs of the web application (login page, home page, etc.) occasionally responds with a non-HTML content, blank content, or redirect response with no body.

Workaround

None

Fix Information

Connection resets are no longer experienced on normal web navigation of a site that is protected by the Proactive Bot Defense mechanism, and one of the main pages of the web application occasionally responds with a non-HTML content.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips