Stack-based buffer overflow in help.cgi in the HTTP administrative interface for (1) Sun Java System Directory Server 5.2 2003Q4, 2004Q2, and 2005Q1, (2) Red Hat Directory Server and (3) Certificate Server before 7.1 SP1, (4) Sun ONE Directory Server 5.1 SP4 and earlier, and (5) Sun ONE Administration Server 5.2 allows remote attackers to cause a denial of service (admin server crash), or local users to gain root privileges.