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Test your applicationsUpgrade RHEL:7 mariadb-server to version 1:5.5.60-1.el7_5 or higher.
This issue was patched in RHSA-2018:2439.
Note: Versions mentioned in the description apply only to the upstream mariadb-server package and not the mariadb-server package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Replication). Supported versions that are affected are 5.5.57 and earlier, 5.6.37 and earlier and 5.7.19 and earlier. Difficult to exploit vulnerability allows high privileged attacker with logon to the infrastructure where MySQL Server executes to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all MySQL Server accessible data. CVSS 3.0 Base Score 4.1 (Confidentiality impacts). CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N).