Description
The my_rand function in functions.php in MyBB (aka MyBulletinBoard) before 1.4.12 does not properly use the PHP mt_rand function, which makes it easier for remote attackers to obtain access to an arbitrary account by requesting a reset of the account's password, and then conducting a brute-force attack.
References
- http://dev.mybboard.net/issues/843
- http://blog.mybb.com/2010/04/13/mybb-1-4-12-released-security-maintenance-update/
- [oss-security] 20101008 CVE request: mybb before 1.4.11 and before 1.4.12 mailing-list
- mybb-myrand-unauth-access(64516) vdb-entry
- http://dev.mybboard.net/projects/mybb/repository/revisions/4872
- [oss-security] 20101011 Re: CVE request: mybb before 1.4.11 and before 1.4.12 mailing-list
- [oss-security] 20101206 Re: CVE request: mybb before 1.4.11 and before 1.4.12 mailing-list