Description
Oracle MySQL 5.5.38 and earlier, 5.6.19 and earlier, and MariaDB 5.5.28a, 5.3.11, 5.2.13, 5.1.66, and possibly other versions, generates different error messages with different time delays depending on whether a user name exists, which allows remote attackers to enumerate valid usernames.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | mysql-5.5 | 5.5.40-0+wheezy1 | DSA-3054-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | mysql-5.5 | 5.5.40-0ubuntu0.14.04.1 | USN-2384-1 |
| Ubuntu 14.04 LTS | mysql-5.6 | 5.6.27-0ubuntu0.14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | mariadb +7 | 1:5.5.40-1.el7_0 | RHSA-2014:1861 |
| RHEL 5 | mysql55-mysql +5 | 5.5.40-2.el5 | RHSA-2014:1859 |
| RHEL 1 | mariadb55-mariadb +5 | 5.5.40-10.el6 | RHSA-2014:1862 |
| RHEL 1 | mysql55-mysql +5 | 5.5.40-1.el6 | RHSA-2014:1860 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 5 | mariadb-galera +2 | 5.5.40-2.el6ost | RHSA-2014:1940, RHSA-2014:1937 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | mariadb104 | 10.4.30-150100.3.5.10 | SUSE-RU-2023:3956-1 |
| SLES 15 SP1 | python-mysqlclient | 1.4.6-150100.3.3.7 | SUSE-RU-2023:3956-1 |
| SLES 12 SP5 | lz4 | 1.8.0-3.5.2 | SUSE-RU-2023:4991-1 |
| SLES 12 SP5 | mariadb-connector-c | 3.1.22-2.35.1 | SUSE-RU-2023:4991-1 |
| SLES 12 SP5 | mariadb104 | 10.4.30-8.5.46 | SUSE-RU-2023:4991-1 |
| SLES 12 SP5 | python-mysqlclient | 1.3.14-8.9.2 | SUSE-RU-2023:4991-1 |
| SLES 12 | mariadb | 10.0.16-15.1 | SUSE-SU-2015:0743-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP1 | mariadb104 | 10.4.30-150100.3.5.10 | SUSE-RU-2023:3956-1 |
| SLES for SAP 15 SP1 | python-mysqlclient | 1.4.6-150100.3.3.7 | SUSE-RU-2023:3956-1 |
| SLES for SAP 12 SP5 | lz4 | 1.8.0-3.5.2 | SUSE-RU-2023:4991-1 |
| SLES for SAP 12 SP5 | mariadb-connector-c | 3.1.22-2.35.1 | SUSE-RU-2023:4991-1 |
| SLES for SAP 12 SP5 | mariadb104 | 10.4.30-8.5.46 | SUSE-RU-2023:4991-1 |
| SLES for SAP 12 SP5 | python-mysqlclient | 1.3.14-8.9.2 | SUSE-RU-2023:4991-1 |
| SLES for SAP 12 | mariadb | 10.0.16-15.1 | SUSE-SU-2015:0743-1 |
| SLE HPC 15 SP1 | mariadb104 | 10.4.30-150100.3.5.10 | SUSE-RU-2023:3956-1 |
| SLE HPC 15 SP1 | python-mysqlclient | 1.4.6-150100.3.3.7 | SUSE-RU-2023:3956-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mariadb | 10.0.22-3.8 | openSUSE-SU-2024:10153-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 2
- MySQL 5.1/5.5 (Windows) - 'MySQLJackpot' Remote Command Execution EDB-23073 · remote · Dec 2, 2012 · verified
- MySQL - Remote User Enumeration EDB-23081 · remote · Dec 2, 2012 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 12
- RHSA-2014:1940 Red Hat Security Advisory: mariadb-galera security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2014:1937 Red Hat Security Advisory: mariadb-galera security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2014:1861 Red Hat Security Advisory: mariadb security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2014:1862 Red Hat Security Advisory: mariadb55-mariadb security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2014:1860 Red Hat Security Advisory: mysql55-mysql security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2014:1859 Red Hat Security Advisory: mysql55-mysql security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2384-1 mysql-5.5 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3054-1 mysql-5.5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-RU-2023:4991-1 Recommended update for mariadb104 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10153-1 libmysqlclient-devel-10.0.22-3.8 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:0743-1 Security update for mariadb SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2023:3956-1 Recommended update for mariadb104 SUSE / openSUSE Security Updates · Feb 4, 2026
References
- MDVSA-2013:102 vendor-advisory
- 53372 third-party-advisory
- [oss-security] 20121202 Re: Re: [Full-disclosure] MySQL (Linux) Stack based buffer overrun PoC Zeroday mailing-list
- 20121201 MySQL Remote Preauth User Enumeration Zeroday mailing-list
- GLSA-201308-06 vendor-advisory
- [oss-security] 20121202 Re: Re: [Full-disclosure] MySQL (Linux) Stack based buffer overrun PoC Zeroday mailing-list
- https://mariadb.atlassian.net/browse/MDEV-3909
- SUSE-SU-2015:0743 vendor-advisory
- SUSE-SU-2013:0262 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html