MariaDB Server 5.5.x < 5.5.51 Multiple Vulnerabilities

high Nessus Network Monitor Plugin ID 9655
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote database server is affected by multiple attack vectors.


MariaDB is a community-developed fork of the MySQL relational database. The version of MariaDB installed on the remote host is 5.5.x earlier than 5.5.51, and is therefore affected by multiple vulnerabilities :

- A denial of service vulnerability exists in the 'emb_stmt_execute()' function in file 'libmysqld/' when handling queries. An authenticated, remote attacker can exploit this to crash the database.
- A flaw in the 'check_log_path()' function in 'sql/' that may allow an authenticated attacker with DBA permissions to gain elevated privileges. The issue is due to the program not properly restricting the ability to write to configuration files (e.g. my.cnf), combined with it loading a configuration file from specific locations that current versions do not use (e.g. '/var/lib/mysql/my.cnf'). This may allow an attacker to leverage specially crafted queries to use logging functionality to create new files or append custom content to existing files. By placing a custom '.cnf' file that MySQL will load, with a 'malloc_lib=' directive pointing to an attacker controlled '' file, the attacker can cause MySQL to read the configuration file and load the malicious library the next time it starts. This can allow the attacker to gain root privileges.
- A denial of service vulnerability exists in the 'st_select_lex_unit::cleanup()' function within file 'sql/' when handling 'UNION' queries during 'JOIN' cleanup. An authenticated, remote attacker can exploit this to crash the database.


Upgrade to version 5.5.51 or later.

See Also

Plugin Details

Severity: High

ID: 9655

Family: Database

Published: 10/7/2016

Updated: 3/6/2019

Dependencies: 8693

Nessus ID: 93611

Risk Information


Risk Factor: High

Base Score: 9

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND


Risk Factor: High

Base Score: 8.8

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:X

Vulnerability Information

CPE: cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:*

Patch Publication Date: 9/13/2016

Vulnerability Publication Date: 9/23/2015

Reference Information

CVE: CVE-2016-6662

BID: 92912