CVE-2016-6663: Race Condition
First published: Tue Dec 13 2016(Updated: )
Race condition in Oracle MySQL before 5.5.52, 5.6.x before 5.6.33, 5.7.x before 5.7.15, and 8.x before 8.0.1; MariaDB before 5.5.52, 10.0.x before 10.0.28, and 10.1.x before 10.1.18; Percona Server before 5.5.51-38.2, 5.6.x before 5.6.32-78-1, and 5.7.x before 5.7.14-8; and Percona XtraDB Cluster before 5.5.41-37.0, 5.6.x before 5.6.32-25.17, and 5.7.x before 5.7.14-26.17 allows local users with certain permissions to gain privileges by leveraging use of my_copystat by REPAIR TABLE to repair a MyISAM table.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MySQL | >=5.5.0<=5.5.52 | |
| MySQL | >=5.6.0<=5.6.33 | |
| MySQL | >=5.7.0<=5.7.15 | |
| Percona Percona Server | >=5.5<5.5.51-38.2 | |
| Percona Percona Server | >=5.6<5.6.32-78.1 | |
| Percona Percona Server | >=5.7<5.7.14-8 | |
| Percona XtraDB Cluster | >=5.5<5.5.41-37.0 | |
| Percona XtraDB Cluster | >=5.6<5.6.32-25.17 | |
| Percona XtraDB Cluster | >=5.7<5.7.14-26.17 | |
| Ariadne CMS | >=5.5.20<5.5.52 | |
| Ariadne CMS | >=10.0.0<10.0.28 | |
| Ariadne CMS | >=10.1.0<10.1.18 | |
| MySQL | =8.0 |
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Reference Links
- http://rhn.redhat.com/errata/RHSA-2016-2130.html
- http://rhn.redhat.com/errata/RHSA-2016-2131.html
- http://rhn.redhat.com/errata/RHSA-2016-2595.html
- http://rhn.redhat.com/errata/RHSA-2016-2749.html
- http://rhn.redhat.com/errata/RHSA-2016-2927.html
- http://rhn.redhat.com/errata/RHSA-2016-2928.html
- http://rhn.redhat.com/errata/RHSA-2017-0184.html
- http://seclists.org/fulldisclosure/2016/Nov/4
- http://www.openwall.com/lists/oss-security/2016/10/25/4
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://www.securityfocus.com/bid/92911
- http://www.securityfocus.com/bid/93614
- https://dev.mysql.com/doc/relnotes/mysql/5.5/en/news-5-5-52.html
- https://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-33.html
- https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-15.html
- https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-1.html
- https://github.com/MariaDB/server/commit/347eeefbfc658c8531878218487d729f4e020805
- https://github.com/mysql/mysql-server/commit/4e5473862e6852b0f3802b0cd0c6fa10b5253291
- https://legalhackers.com/advisories/MySQL-Maria-Percona-PrivEscRace-CVE-2016-6663-5616-Exploit.html
- https://mariadb.com/kb/en/mariadb/mariadb-10028-release-notes/
- https://mariadb.com/kb/en/mariadb/mariadb-10118-release-notes/
- https://mariadb.com/kb/en/mariadb/mariadb-5552-release-notes/
- https://www.exploit-db.com/exploits/40678/
- https://www.percona.com/blog/2016/11/02/percona-responds-to-cve-2016-6663-and-cve-2016-6664/
Frequently Asked Questions
What is the severity of CVE-2016-6663?
CVE-2016-6663 has been assigned a medium severity level due to its potential impact on system integrity.
How do I fix CVE-2016-6663?
To fix CVE-2016-6663, upgrade MySQL to versions 5.5.52, 5.6.33, 5.7.15, or 8.0.1, or apply the relevant patches.
Which versions are affected by CVE-2016-6663?
CVE-2016-6663 affects multiple MySQL versions, including 5.5 before 5.5.52, 5.6 before 5.6.33, and various versions of MariaDB and Percona Server.
What are the potential impacts of CVE-2016-6663?
The potential impacts of CVE-2016-6663 include data corruption and inconsistent database operations due to a race condition.
Is there a workaround for CVE-2016-6663?
There are no known effective workarounds for CVE-2016-6663, so it is recommended to apply patches or upgrade to safer versions.
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