IBM DB2 Universal Database (UDB) before 8.1 FixPak 13 allows remote authenticated users to cause a denial of service (crash) by (1) sending the first ACCSEC command without an RDBNAM parameter during the CONNECT process, or (2) sending crafted SQLJRA packet, which results in a null dereference.
Unknown vulnerability in IBM DB2 8.1.4 through 8.1.9 and 8.2.0 through 8.2.2 allows local users with SELECT privileges to conduct unauthorized activities and insert, update or delete table contents.