IBM DB2 9.5 before FP7 and 9.7 before FP4 on Linux, UNIX, and Windows does not properly enforce privilege requirements for table access, which allows remote authenticated users to modify SYSSTAT.TABLES statistics columns via an UPDATE statement. NOTE: some of these details are obtained from third party information.

IBM DB2 9.1 before FP10, 9.5 before FP6a, and 9.7 before FP2 on Linux, UNIX, and Windows does not properly revoke the DBADM authority, which allows remote authenticated users to execute non-DDL statements by leveraging previous possession of this authority.

Buffer overflow in the DB2 Administration Server (DAS) component in IBM DB2 9.1 before FP10, 9.5 before FP7, and 9.7 before FP3 on Linux, UNIX, and Windows allows remote attackers to execute arbitrary code via unspecified vectors.

Memory leak in the Relational Data Services component in IBM DB2 UDB 9.5 before FP6a allows remote authenticated users to cause a denial of service (heap memory consumption) by executing a (1) user-defined function (UDF) or (2) stored procedure while using a different code page than the database server.

Memory leak in the Relational Data Services component in IBM DB2 UDB 9.5 before FP6a, when the connection concentrator is enabled, allows remote authenticated users to cause a denial of service (heap memory consumption) by using a different code page than the database server.

Stack-based buffer overflow in the validateUser implementation in the com.ibm.db2.das.core.DasSysCmd function in db2dasrrm in the DB2 Administration Server (DAS) component in IBM DB2 9.1 before FP10, 9.5 before FP6a, and 9.7 before FP3 allows remote attackers to execute arbitrary code via a long username string.

The audit facility in the Security component in IBM DB2 UDB 9.5 before FP6a uses instance-level audit settings to capture connection (aka CONNECT and AUTHENTICATION) events in certain circumstances in which database-level audit settings were intended, which might make it easier for remote attackers to connect without discovery.

The Install component in IBM DB2 UDB 9.5 before FP6a on Linux, UNIX, and Windows enforces an unintended limit on password length, which makes it easier for attackers to obtain access via a brute-force attack.

The "Query Compiler, Rewrite, Optimizer" component in IBM DB2 UDB 9.5 before FP6a allows remote authenticated users to cause a denial of service (CPU consumption) via a crafted query involving certain UNION ALL views, leading to an indefinitely large amount of compilation time.

The DRDA Services component in IBM DB2 UDB 9.5 before FP6a allows remote authenticated users to cause a denial of service (database server ABEND) by using the client CLI on Linux, UNIX, or Windows for executing a prepared statement with a large number of parameter markers.