Bug ID 1821373: SAML Assertion Handling issue in APM SSO

Last Modified: Oct 15, 2025

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

Known Affected Versions:
17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2

Fixed In:
17.5.1, 17.1.3

Opened: Feb 21, 2025

Severity: 2-Critical

Symptoms

When attributes with large encrypted values are present, the allocated memory may not be appropriately resized, leading to unexpected behavior, or tmm may crash.

Impact

Traffic disrupted while tmm restarts.

Conditions

This occurs specifically under configurations that utilize SAML with encrypted attributes containing large values.

Workaround

None

Fix Information

SAML Assertion Handling issue in APM SSO has been addressed.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips