Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Memcached). Supported versions that are affected are 5.6.35 and earlier and 5.7.17 and earlier. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. External References: http://www.oracle.com/technetwork/security-advisory/cpuapr2017-3236618.html#AppendixMSQL
Created community-mysql tracking bugs for this issue: Affects: fedora-all [bug 1443407]
The only recent change to the innodb_memcached plugin is: https://github.com/mysql/mysql-server/commit/659514dc83299a7d8c7defeb543be4339fbe1ee1 Also mentioned in the release notes: InnoDB: A memcached read operation with a non-default read batch size configuration resulted in a server exit. (Bug #25147515) https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-18.html https://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-36.html While Oracle CPU lists this as unauthenticated attack, attacker requires read access to the mysqld's memcached port. MySQL documentation explicitly notes that only trusted users should be granted such access. https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-security.html
This issue has been addressed in the following products: Red Hat Software Collections for Red Hat Enterprise Linux 6 Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7 Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS Via RHSA-2017:2787 https://access.redhat.com/errata/RHSA-2017:2787
This issue has been addressed in the following products: Red Hat Software Collections for Red Hat Enterprise Linux 6 Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7 Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS Via RHSA-2017:2886 https://access.redhat.com/errata/RHSA-2017:2886