Last Modified: Jun 28, 2025
Affected Product(s):
BIG-IP DNS, GTM, LTM
Known Affected Versions:
16.1.5, 16.1.5.1, 16.1.5.2, 16.1.6, 17.1.2, 17.1.2.1, 17.1.2.2, 17.5.0, 17.5.1
Opened: May 19, 2025 Severity: 3-Major
A database monitor (mssql, mysql, oracle, postgresql) may incorrectly mark a pool member as UP if the monitor is configured with a 'recv' string, but the query configured in the 'send' string does not return any results from the database server. In this case, the DB (database) monitor attempts to match the 'recv' string to the result set from the database server, and fails to mark an empty result set as a mismatch.
Pool members may be incorrectly marked UP.
-- A DB (database) monitor (mssql, mysql, oracle, postgresql) is configured and applied to an LTM or GTM pool. -- The DB monitor has a 'send' string configured with a query that does not return any results from the database server. -- The DB monitor has a 'recv' string configured.
In the DB monitor configuration, modify the query in the 'send' to return a result that does not match the 'recv' string.
None