The default configuration of TLS in IBM Tivoli Directory Server (TDS) 6.3 and earlier supports the (1) NULL-MD5 and (2) NULL-SHA ciphers, which allows remote attackers to trigger unencrypted communication via the TLS Handshake Protocol.

IBM Tivoli Directory Server (TDS) 6.3 and earlier allows remote attackers to cause a denial of service (daemon crash) via a malformed LDAP paged search request.

IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-LA0007 does not properly handle the simultaneous changing of multiple passwords, which makes it easier for remote authenticated users to cause a denial of service (DB2 daemon deadlock) by making password changes that trigger updates to a DB2 password-history table.

The LDAP_ADD implementation in IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-IF0009 stores a cleartext SHA password in the change log, which might allow local users to obtain sensitive information by reading this log.

The get_filter_list function in IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-LA0006 does not properly perform certain sub filter parsing, which allows remote authenticated users to cause a denial of service (infinite loop) via a malformed search filter.

Memory leak in the ldap_explode_rdn API function in IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-LA0007 allows remote authenticated users to cause a denial of service (memory consumption) by making many function calls.

Stack-based buffer overflow in the server process in ibmslapd.exe in IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-IF0010, 6.0 before 6.0.0.67 (aka 6.0.0.8-TIV-ITDS-IF0009), 6.1 before 6.1.0.40 (aka 6.1.0.5-TIV-ITDS-IF0003), 6.2 before 6.2.0.16 (aka 6.2.0.3-TIV-ITDS-IF0002), and 6.3 before 6.3.0.3 (aka 6.3.0.0-TIV-ITDS-IF0003) allows remote attackers to execute arbitrary code via a crafted LDAP request. NOTE: some of these details are obtained from third party information.

Multiple memory leaks in the (1) ldap_init and (2) ldap_url_search_direct API functions in IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-LA0007 allow remote authenticated users to cause a denial of service (memory consumption) by making many function calls.

IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-IF0010 on Windows allows remote authenticated users to cause a denial of service (daemon hang) via a cn=changelog search.

Double free vulnerability in IBM Tivoli Directory Server (TDS) 5.2 before 5.2.0.5-TIV-ITDS-LA0005 allows remote authenticated users to cause a denial of service (ABEND) via search operations that trigger recursive filter_free calls.