CVE-2016-6662

NameCVE-2016-6662
DescriptionOracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB before 5.5.51, 10.0.x before 10.0.27, and 10.1.x before 10.1.17; and Percona Server before 5.5.51-38.1, 5.6.x before 5.6.32-78.0, and 5.7.x before 5.7.14-7 allow local users to create arbitrary configurations and bypass certain protection mechanisms by setting general_log_file to a my.cnf configuration. NOTE: this can be leveraged to execute arbitrary code with root privileges by setting malloc_lib. NOTE: the affected MySQL version information is from Oracle's October 2016 CPU. Oracle has not commented on third-party claims that the issue was silently patched in MySQL 5.5.52, 5.6.33, and 5.7.15.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-624-1, DSA-3666-1
NVD severityhigh (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mariadb-10.0 (PTS)jessie10.0.27-0+deb8u1fixed
jessie (security)10.0.30-0+deb8u1fixed
mysql-5.5 (PTS)wheezy5.5.47-0+deb7u1vulnerable
wheezy (security)5.5.54-0+deb7u2fixed
jessie5.5.53-0+deb8u1fixed
jessie (security)5.5.54-0+deb8u1fixed
mysql-5.7 (PTS)sid5.7.17-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mariadb-10.0source(unstable)10.0.27-1high
mariadb-10.0sourcejessie10.0.27-0+deb8u1high
mysql-5.5source(unstable)(unfixed)high
mysql-5.5sourcejessie5.5.52-0+deb8u1highDSA-3666-1
mysql-5.5sourcewheezy5.5.52-0+deb7u1highDLA-624-1
mysql-5.6source(unstable)5.6.34-1high
mysql-5.7source(unstable)5.7.15-1high

Notes

This will likely be split by MITRE, unclear what precisely maps to CVE-2016-6662
As well unclear which commits from https://bugzilla.redhat.com/show_bug.cgi?id=1375198#c5 are associated
yet to which CVE; those will unlikely made public before the next Oracle CPU.
https://marc.info/?l=oss-security&m=147367658314062&w=2
http://legalhackers.com/advisories/MySQL-Exploit-Remote-Root-Code-Execution-Privesc-CVE-2016-6662.html
https://bugzilla.novell.com/show_bug.cgi?id=998309
Fixed in upstream Oracle MySQL 5.5.52, 5.6.33 and 5.7.15
MariaDB: https://jira.mariadb.org/browse/MDEV-10465
Fixed in upstream MariaDB 5.5.51, 10.0.27, 10.1.17
PerconaDB: https://www.percona.com/blog/2016/09/12/database-affected-cve-2016-6662/
Although Oracle mentions this CVE only to be fixed in 5.5.53 this is not
true for src:mysql-5.5 as in Debian and other Linux distributions, so
this CVE should not be listed for a DSA/DLA based on 5.5.53, cf #841050

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