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Public proof of conceptFix available

CVE-2015-3152

A public proof of concept exists; no exploitation attested.

  • Published2016-05-16
  • WeaknessCWE-295

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2016-05-1610:59CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub

Versions per branch

NVD
MySQL
BranchAffectedFixed in
5.7≤ 5.7.2no fix published
Redhat enterprise linux eus
BranchAffectedFixed in
7.1= 7.1no fix published
7.2= 7.2no fix published
7.3= 7.3no fix published
7.4= 7.4no fix published
7.5= 7.5no fix published
7.6= 7.6no fix published
7.7= 7.7no fix published
Redhat enterprise linux server aus
BranchAffectedFixed in
7.3= 7.3no fix published
7.4= 7.4no fix published
7.6= 7.6no fix published
7.7= 7.7no fix published

9 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • mariadbSUSE:Linux Enterprise Workstation Extension 12all versions · fixed in 10.0.20-18.1
  • mariadbSUSE:Linux Enterprise Software Development Kit 12all versions · fixed in 10.0.20-18.1
  • mariadbSUSE:Linux Enterprise Server for SAP Applications 12all versions · fixed in 10.0.20-18.1
  • mariadbSUSE:Linux Enterprise Server 12all versions · fixed in 10.0.20-18.1
  • mariadbSUSE:Linux Enterprise Desktop 12all versions · fixed in 10.0.20-18.1
  • mariadbRed Hat:enterprise_linux:7::workstationall versions · fixed in 1:5.5.44-1.el7_1and 8 other packages
  • mariadbRed Hat:enterprise_linux:7::serverall versions · fixed in 1:5.5.44-1.ael7b_1and 8 other packages
  • mariadbRed Hat:enterprise_linux:7::computenodeall versions · fixed in 1:5.5.44-1.el7_1and 8 other packages

26 more package ranges on OSV.dev

Vendor advisories

  • CVE-2015-3152 Red Hat Product Security244 products fixed · 28 known affected

    mysql: use of SSL/TLS can not be enforced in mysql client library (oCERT-2015-003, BACKRONYM)

    mysql55-mysql.src as a component of Red Hat Enterprise Linux 5 · mysql as a component of Red Hat Enterprise Linux 6 · mysql-bench as a component of Red Hat Enterprise Linux 6 · +25 more

  • RHSA-2015:1665 Red Hat Product Security111 products fixed

    Red Hat Security Advisory: mariadb security update

  • RHSA-2015:1647 Red Hat Product Security56 products fixed

    Red Hat Security Advisory: mariadb55-mariadb security update

  • RHSA-2015:1646 Red Hat Product Security77 products fixed

    Red Hat Security Advisory: rh-mariadb100-mariadb security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2015:1665 · 111 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  2. No fix planned, says the vendor Red Hat Product Security CVE-2015-3152 · 28 productsWill not fix

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
2016-05-16
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-p7qr-v5jx-7qv3

Frequently asked questions

What is 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.

Is CVE-2015-3152 actively exploited?

Active exploitation of CVE-2015-3152 has not been confirmed. Its EPSS score was 7.1% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2015-3152?

CVE-2015-3152 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

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