Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP APM
Known Affected Versions:
11.5.4, 11.5.4 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 12.0.0, 12.0.0 HF1, 12.0.0 HF2
Fixed In:
12.1.0, 12.0.0 HF3, 11.6.1 HF1, 11.5.4 HF2
Opened: Dec 22, 2015 Severity: 3-Major Related Article:
K18315582
If the delegation account is enforced to use AES256 encryption, then APM Kerberos SSO will fail. Example error message: Dec 18 19:22:19 bigip8910mgmt err websso.7[31499]: 014d0005:3: Kerberos: can't decrypt S4U2Self ticket for user 'username' - Decrypt integrity check failed (-1765328353).
Kerberos SSO will fail and user will be prompted to enter credential.
Delegation account is enforced to use AES256 encryption.
Disable the option to enforce AES256 encryption for the delegation account.
Delegation account can be enforced to use AES256 encryption, provided the delegation account is configured as SPN format on the Kerberos SSO configuration.