CVE-2012-2122

sql/password.c in Oracle MySQL 5.1.x before 5.1.63, 5.5.x before 5.5.24, and 5.6.x before 5.6.6, and MariaDB 5.1.x before 5.1.62, 5.2.x before 5.2.12, 5.3.x before 5.3.6, and 5.5.x before 5.5.23, when running in certain environments with certain implementations of the memcmp function, allows remote attackers to bypass authentication by repeatedly authenticating with the same incorrect password, which eventually causes a token comparison to succeed due to an improperly-checked return value.

CVSS v2.0

5.1 MEDIUMAV:N/AC:H/Au:N/C:P/I:P/A:P

EPSS

96.50% chance of exploitation in the next 30 days, 100th percentile

Nuclei

medium · CWE-287

Published

2012-06-26

Updated

2024-08-06

Proof-of-concept exploits (6)

• http://www.exploit-db.com/exploits/19092
• cyberharsh/Oracle-mysql-CVE-2012-21221★ · 2020-06-24
• subinyy/docker_CVE_2012_21220★ · 2025-04-27
• yunkihong-dev/Vulhub0★ · 2025-09-12
• zhangkaibin0921/CVE-2012-21220★ · 2023-12-01
• K3ysTr0K3R/CVE-2012-2122

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/javascript/cves/2012/CVE-2012-2122.yaml

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/auxiliary/scanner/mysql/mysql_authbypass_…

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/19092

Vulhub environments (1)

• vulhub/vulhub/tree/master/mysql/CVE-2012-2122

References

• CVE Record
• NVD entry

Related

• CVE-2012-1823
• CVE-2013-4547
• CVE-2014-6271
• CVE-2015-1427
• CVE-2016-10033
• CVE-2017-12615