BugZero | F5 BugID 578399 - Adding an option for negative validation of occure...

F5 - Defect ID: 578399

Adding an option for negative validation of occurence of a string in the header

F5 - Defect ID: 578399

Adding an option for negative validation of occurence of a string in the header

Last updated on July 18th, 2026

BugZero Risk Score
6.9 Medium

Overall: 6.9

Severity: 7.3

Community: 4.2

Lifecycle: 8.3

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Bug Details

Priority: 3-Major
Status: Verified
Impact Category: Application Security Manager

Description

Symptoms

ASM doesn't have the option to filter a Login attempt according to a negative validation of occurrence of a header, which occurs in logins that issue a redirect.

Impact

It is not possible to filter redirect login pages

Conditions

This occurs for all Login Attempts if the login results in redirect

Workaround

N/A

Fix Information

ASM now has the ability to detect successful and failed logins when the result of login is a redirect.

Change history

Links

Original Vendor Announcement

Relevant Products

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Affected versions:12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4, 12.1.0, 12.1.0 hf1, 12.1.0 hf2, 12.1.1, 12.1.1 hf1, 12.1.1 hf2, 12.1.2, 12.1.2 hf1, 12.1.2 hf2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Fixed versions: 13.0.0

Relevant Products

Click on a version to see all relevant bugs

Fixed versions: 13.0.0

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F5 - Defect ID: 578399

Adding an option for negative validation of occurence of a string in the header

F5 - Defect ID: 578399

Adding an option for negative validation of occurence of a string in the header

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

F5 - Defect ID: 578399

Adding an option for negative validation of occurence of a string in the header

F5 - Defect ID: 578399

Adding an option for negative validation of occurence of a string in the header

Last updated on July 18th, 2026

BugZero Risk Score6.9 Medium

Bug Details

Symptoms

Impact

Conditions

Workaround

Fix Information

Links

Top F5 Defects

Ready to prevent the next vendor outage?

BugZero Risk Score
6.9 Medium

BugZero Risk Score
6.9 Medium