The COM_CHANGE_USER command in MySQL 3.x before 3.23.54, and 4.x before 4.0.6, allows remote attackers to gain privileges via a brute force attack using a one-character password, which causes MySQL to only compare the provided password against the first character of the real password.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10847
http://www.trustix.net/errata/misc/2002/TSL-2002-0086-mysql.asc.txt
http://www.securityfocus.com/advisories/5269
http://www.redhat.com/support/errata/RHSA-2003-166.html
http://www.redhat.com/support/errata/RHSA-2002-289.html
http://www.redhat.com/support/errata/RHSA-2002-288.html
http://www.novell.com/linux/security/advisories/2003_003_mysql.html
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2002:087
http://www.linuxsecurity.com/advisories/engarde_advisory-2660.html
http://www.debian.org/security/2002/dsa-212
http://security.e-matters.de/advisories/042002.html
http://marc.info/?l=bugtraq&m=104005886114500&w=2
http://marc.info/?l=bugtraq&m=104004857201968&w=2
http://marc.info/?l=bugtraq&m=103971644013961&w=2
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000555