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Vulnerability record · CVE-2015-3152 · published 16 May 2016

CVE-2015-3152: Oracle mysql improper certificate validation vulnerability

Oracle · Mysql

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.

5.9 CVSS 3.1 Medium EPSS 7.1% · top 6.0% CWE-295 · Improper certificate validation
5.9CVSS 3.1 base score, v2 4.3
7.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
12Affected product versions listed by NVD
34References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

12 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161436.html Mailing ListThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161625.html Mailing ListThird Party Advisory
http://mysqlblog.fivefarmers.com/2014/04/02/redefining-ssl-option/ ExploitThird Party Advisory
http://mysqlblog.fivefarmers.com/2015/04/29/ssltls-in-5-6-and-5-5-ocert-advisory/ Third Party Advisory
http://packetstormsecurity.com/files/131688/MySQL-SSL-TLS-Downgrade.html Third Party AdvisoryVDB Entry
http://rhn.redhat.com/errata/RHSA-2015-1646.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1647.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1665.html Third Party Advisory
http://www.debian.org/security/2015/dsa-3311 Third Party Advisory
http://www.ocert.org/advisories/ocert-2015-003.html Vendor Advisory
http://www.securityfocus.com/archive/1/535397/100/1100/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/74398 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1032216 Third Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/cve-2015-3152 Third Party Advisory
https://github.com/mysql/mysql-server/commit/3bd5589e1a5a93f9c224badf983cd65c45215390 PatchThird Party Advisory
https://jira.mariadb.org/browse/MDEV-7937 Issue TrackingVendor Advisory
https://www.duosecurity.com/blog/backronym-mysql-vulnerability Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161436.html Mailing ListThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161625.html Mailing ListThird Party Advisory
http://mysqlblog.fivefarmers.com/2014/04/02/redefining-ssl-option/ ExploitThird Party Advisory
http://mysqlblog.fivefarmers.com/2015/04/29/ssltls-in-5-6-and-5-5-ocert-advisory/ Third Party Advisory
http://packetstormsecurity.com/files/131688/MySQL-SSL-TLS-Downgrade.html Third Party AdvisoryVDB Entry
http://rhn.redhat.com/errata/RHSA-2015-1646.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1647.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1665.html Third Party Advisory
http://www.debian.org/security/2015/dsa-3311 Third Party Advisory
http://www.ocert.org/advisories/ocert-2015-003.html Vendor Advisory
http://www.securityfocus.com/archive/1/535397/100/1100/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/74398 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1032216 Third Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/cve-2015-3152 Third Party Advisory
https://github.com/mysql/mysql-server/commit/3bd5589e1a5a93f9c224badf983cd65c45215390 PatchThird Party Advisory
https://jira.mariadb.org/browse/MDEV-7937 Issue TrackingVendor Advisory
https://www.duosecurity.com/blog/backronym-mysql-vulnerability Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2015-3152), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.