CVE-2016-6664

MySQL / MariaDB / PerconaDB 5.5.x/5.6.x/5.7.x - 'root' System User Privilege Escalation

Severity Score

7.0

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

mysqld_safe in Oracle MySQL through 5.5.51, 5.6.x through 5.6.32, and 5.7.x through 5.7.14; MariaDB; 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, when using file-based logging, allows local users with access to the mysql account to gain root privileges via a symlink attack on error logs and possibly other files.

mysqld_safe en Oracle MySQL hasta la versión 5.5.51, 5.6.x hasta la versión 5.6.32 y 5.7.x hasta la versión 5.7.14; MariaDB; Percona Server en versiones anteriores a 5.5.51-38.2, 5.6.x en versiones anteriores a 5.6.32-78-1 y 5.7.x en versiones anteriores a 5.7.14-8 y Percona XtraDB Cluster en versiones anteriores a 5.5.41-37.0, 5.6.x en versiones anteriores a 5.6.32-25.17 y 5.7.x en versiones anteriores a 5.7.14-26.17, cuando usa un inicio de sesión basada en archivo, permite a usuarios locales con acceso a la cuenta mysql obtener privilegios de root a través de un ataque de enlace simbólico en errores de acceso y posiblemente otros archivos.

A flaw was found in the way the mysqld_safe script handled creation of error log file. The mysql operating system user could use this flaw to escalate their privileges to root.

MySQL is a multi-user, multi-threaded SQL database server. It consists of the MySQL server daemon, mysqld, and many client programs. The following packages have been upgraded to a newer upstream version: rh-mysql56-mysql. Security Fix: It was discovered that the MySQL logging functionality allowed writing to MySQL configuration files. An administrative database user, or a database user with FILE privileges, could possibly use this flaw to run arbitrary commands with root privileges on the system running the database server.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-08-10 CVE Reserved
2016-11-02 CVE Published
2016-11-02 First Exploit
2024-08-06 CVE Updated
2025-04-03 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-59: Improper Link Resolution Before File Access ('Link Following')

CAPEC

References (18)

URL	Tag	Source
http://seclists.org/fulldisclosure/2016/Nov/4	Mailing List
http://www.securityfocus.com/archive/1/539695/100/0/threaded	Mailing List
http://www.securityfocus.com/bid/93612	Third Party Advisory

URL	Date	SRC
https://packetstorm.news/files/id/139491	2016-11-02
https://www.exploit-db.com/exploits/40679	2024-08-06
http://legalhackers.com/advisories/MySQL-Maria-Percona-RootPrivEsc-CVE-2016-6664-5617-Exploit.html	2024-08-06
http://packetstormsecurity.com/files/139491/MySQL-MariaDB-PerconaDB-Root-Privilege-Escalation.html	2024-08-06

URL	Date	SRC
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html	2023-01-24

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2016-2130.html	2023-01-24
http://rhn.redhat.com/errata/RHSA-2016-2749.html	2023-01-24
http://www.debian.org/security/2017/dsa-3770	2023-01-24
https://access.redhat.com/errata/RHSA-2017:2192	2023-01-24
https://access.redhat.com/errata/RHSA-2018:0279	2023-01-24
https://access.redhat.com/errata/RHSA-2018:0574	2023-01-24
https://security.gentoo.org/glsa/201702-18	2023-01-24
https://www.percona.com/blog/2016/11/02/percona-responds-to-cve-2016-6663-and-cve-2016-6664	2023-01-24
https://access.redhat.com/security/cve/CVE-2016-6664	2018-03-21
https://bugzilla.redhat.com/show_bug.cgi?id=1386564	2018-03-21

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Oracle Search vendor "Oracle"		Mysql Search vendor "Oracle" for product "Mysql"				>= 5.5.0 <= 5.5.51 Search vendor "Oracle" for product "Mysql" and version " >= 5.5.0 <= 5.5.51"		-		Affected
Oracle Search vendor "Oracle"		Mysql Search vendor "Oracle" for product "Mysql"				>= 5.6.0 <= 5.6.32 Search vendor "Oracle" for product "Mysql" and version " >= 5.6.0 <= 5.6.32"		-		Affected
Oracle Search vendor "Oracle"		Mysql Search vendor "Oracle" for product "Mysql"				>= 5.7.0 <= 5.7.14 Search vendor "Oracle" for product "Mysql" and version " >= 5.7.0 <= 5.7.14"		-		Affected
Mariadb Search vendor "Mariadb"		Mariadb Search vendor "Mariadb" for product "Mariadb"				>= 5.5.0 < 5.5.54 Search vendor "Mariadb" for product "Mariadb" and version " >= 5.5.0 < 5.5.54"		-		Affected
Mariadb Search vendor "Mariadb"		Mariadb Search vendor "Mariadb" for product "Mariadb"				>= 10.0.0 < 10.0.29 Search vendor "Mariadb" for product "Mariadb" and version " >= 10.0.0 < 10.0.29"		-		Affected
Mariadb Search vendor "Mariadb"		Mariadb Search vendor "Mariadb" for product "Mariadb"				>= 10.1.0 < 10.1.21 Search vendor "Mariadb" for product "Mariadb" and version " >= 10.1.0 < 10.1.21"		-		Affected
Percona Search vendor "Percona"		Percona Server Search vendor "Percona" for product "Percona Server"				>= 5.5 < 5.5.51-38.2 Search vendor "Percona" for product "Percona Server" and version " >= 5.5 < 5.5.51-38.2"		-		Affected
Percona Search vendor "Percona"		Percona Server Search vendor "Percona" for product "Percona Server"				>= 5.6 < 5.6.32-78.1 Search vendor "Percona" for product "Percona Server" and version " >= 5.6 < 5.6.32-78.1"		-		Affected
Percona Search vendor "Percona"		Percona Server Search vendor "Percona" for product "Percona Server"				>= 5.7 < 5.7.14-8 Search vendor "Percona" for product "Percona Server" and version " >= 5.7 < 5.7.14-8"		-		Affected
Percona Search vendor "Percona"		Xtradb Cluster Search vendor "Percona" for product "Xtradb Cluster"				>= 5.5 < 5.5.41-37.0 Search vendor "Percona" for product "Xtradb Cluster" and version " >= 5.5 < 5.5.41-37.0"		-		Affected
Percona Search vendor "Percona"		Xtradb Cluster Search vendor "Percona" for product "Xtradb Cluster"				>= 5.6 < 5.6.32-25.17 Search vendor "Percona" for product "Xtradb Cluster" and version " >= 5.6 < 5.6.32-25.17"		-		Affected
Percona Search vendor "Percona"		Xtradb Cluster Search vendor "Percona" for product "Xtradb Cluster"				>= 5.7 < 5.7.14-26.17 Search vendor "Percona" for product "Xtradb Cluster" and version " >= 5.7 < 5.7.14-26.17"		-		Affected