CVE:CVE-2019-2974
CNNVD:CNNVD-201910-989
Oracle MySQL是美国甲骨文（Oracle）公司的一套开源的关系数据库管理系统。
Oracle MySQL中的MySQL Server 5.6.45及之前版本、5.7.27及之前版本和8.0.17及之前版本的Server: Optimizer组件存在安全漏洞。攻击者可利用该漏洞造成拒绝服务（挂起或频繁崩溃），影响数据的可用性。
solution:Upgrade oracle mysql to a higher version than 5.6.45,5.7.27,8.0.17,and avoid the version [5.6.0,5.6.45],[5.7.0,5.7.27],[8.0.0,8.0.17]; Upgrade mariadb mariadb to a higher version than 5.5.66,10.1.42,10.2.28,10.3.19,10.4.9,and avoid the version [5.5.0,5.5.66),[10.1.0,10.1.42),[10.2.0,10.2.28),[10.3.0,10.3.19),[10.4.0,10.4.9); Upgrade canonical ubuntu_linux to a higher version than 16.04,18.04,19.04,19.10,and avoid the version 16.04,18.04,19.04,19.10; Upgrade fedoraproject fedora to a higher version than 29,30,31,and avoid the version 29,30,31; Upgrade opensuse leap to a higher version than 15.1,and avoid the version 15.1