The c-client library 2000, 2001, or 2004 for PHP before 4.4.4 and 5.x
before 5.1.5 do not check the (1) safe_mode or (2) open_basedir
functions, and when used in applications that accept user-controlled
input for the mailbox argument to the imap_open function, allow remote
attackers to obtain access to an IMAP stream data structure and
conduct unauthorized IMAP actions.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BUGTRAQ:20060228 (PHP) imap functions bypass safemode and open_basedir restrictions
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