OpenLDAP 1.0 through 2.1.19, as used in Apple Mac OS 10.3.4 and 10.3.5 and possibly other operating systems, may allow certain authentication schemes to use hashed (crypt) passwords in the userPassword attribute as if they were plaintext passwords, which allows remote attackers to re-use hashed passwords without decrypting them.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10703
https://exchange.xforce.ibmcloud.com/vulnerabilities/17300
http://www.securityfocus.com/bid/11137
http://www.securityfocus.com/advisories/7148
http://www.redhat.com/support/errata/RHSA-2005-751.html
http://www.auscert.org.au/render.html?it=4363
http://support.avaya.com/elmodocs2/security/ASA-2006-157.htm
http://secunia.com/advisories/21520