Vulnerability Monitor

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CVE-2015-3152

Oracle MySQL before 5.7.3, Oracle MySQL Connector/C (aka libmysqlclient) before 6.1.3, and MariaDB before 5.5.44 use the --ssl option to mean that SSL is optional, which allows man-in-the-middle attackers to spoof servers via a cleartext-downgrade attack, aka a "BACKRONYM" attack.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 12 products from oracle, from oracle, from mariadb and 9 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2016, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2016-05-16T10:59:01.220

Last Modified

2026-05-06T22:30:45.220

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-295

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	oracle	mysql	≤ 5.7.2	Yes
Application	oracle	mysql_connector\/c	≤ 6.1.2	Yes
Application	mariadb	mariadb	< 5.5.44	Yes
Application	mariadb	mariadb	< 10.0.20	Yes
Operating System	fedoraproject	fedora	21	Yes
Operating System	fedoraproject	fedora	22	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	redhat	enterprise_linux_desktop	7.0	Yes
Operating System	redhat	enterprise_linux_eus	7.1	Yes
Operating System	redhat	enterprise_linux_eus	7.2	Yes
Operating System	redhat	enterprise_linux_eus	7.3	Yes
Operating System	redhat	enterprise_linux_eus	7.4	Yes
Operating System	redhat	enterprise_linux_eus	7.5	Yes
Operating System	redhat	enterprise_linux_eus	7.6	Yes
Operating System	redhat	enterprise_linux_eus	7.7	Yes
Operating System	redhat	enterprise_linux_server	7.0	Yes
Operating System	redhat	enterprise_linux_server_aus	7.3	Yes
Operating System	redhat	enterprise_linux_server_aus	7.4	Yes
Operating System	redhat	enterprise_linux_server_aus	7.6	Yes
Operating System	redhat	enterprise_linux_server_aus	7.7	Yes
Operating System	redhat	enterprise_linux_server_tus	7.3	Yes
Operating System	redhat	enterprise_linux_server_tus	7.6	Yes
Operating System	redhat	enterprise_linux_server_tus	7.7	Yes
Operating System	redhat	enterprise_linux_workstation	7.0	Yes
Application	php	php	< 5.4.43	Yes
Application	php	php	< 5.5.27	Yes
Application	php	php	< 5.6.11	Yes

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161436.html Mailing List, Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161625.html Mailing List, Third Party Advisory ([email protected])
http://mysqlblog.fivefarmers.com/2014/04/02/redefining-ssl-option/ Exploit, Third Party Advisory ([email protected])
http://mysqlblog.fivefarmers.com/2015/04/29/ssltls-in-5-6-and-5-5-ocert-advisory/ Third Party Advisory ([email protected])
http://packetstormsecurity.com/files/131688/MySQL-SSL-TLS-Downgrade.html Third Party Advisory, VDB Entry ([email protected])
http://rhn.redhat.com/errata/RHSA-2015-1646.html Third Party Advisory ([email protected])
http://rhn.redhat.com/errata/RHSA-2015-1647.html Third Party Advisory ([email protected])
http://rhn.redhat.com/errata/RHSA-2015-1665.html Third Party Advisory ([email protected])
http://www.debian.org/security/2015/dsa-3311 Third Party Advisory ([email protected])
http://www.ocert.org/advisories/ocert-2015-003.html Vendor Advisory ([email protected])
http://www.securityfocus.com/archive/1/535397/100/1100/threaded Third Party Advisory, VDB Entry ([email protected])
http://www.securityfocus.com/bid/74398 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1032216 Third Party Advisory, VDB Entry ([email protected])
https://access.redhat.com/security/cve/cve-2015-3152 Third Party Advisory ([email protected])
https://github.com/mysql/mysql-server/commit/3bd5589e1a5a93f9c224badf983cd65c45215390 Patch, Third Party Advisory ([email protected])
https://jira.mariadb.org/browse/MDEV-7937 Issue Tracking, Vendor Advisory ([email protected])
https://www.duosecurity.com/blog/backronym-mysql-vulnerability Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161436.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161625.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://mysqlblog.fivefarmers.com/2014/04/02/redefining-ssl-option/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://mysqlblog.fivefarmers.com/2015/04/29/ssltls-in-5-6-and-5-5-ocert-advisory/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://packetstormsecurity.com/files/131688/MySQL-SSL-TLS-Downgrade.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2015-1646.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2015-1647.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2015-1665.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2015/dsa-3311 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.ocert.org/advisories/ocert-2015-003.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/535397/100/1100/threaded Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/74398 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1032216 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/security/cve/cve-2015-3152 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/mysql/mysql-server/commit/3bd5589e1a5a93f9c224badf983cd65c45215390 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://jira.mariadb.org/browse/MDEV-7937 Issue Tracking, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.duosecurity.com/blog/backronym-mysql-vulnerability Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For oracle's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.