The do_extendedOp function in ibmslapd in IBM Tivoli Directory Server (TDS) 6.2 on Linux allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted SecureWay 3.2 Event Registration Request (aka a 1.3.18.0.2.12.1 request).
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.