Multiple buffer overflows in the JAR file administration routines in the BSU JAVA subcomponent in IBM DB2 8 before FP16, 9.1 before FP4a, and 9.5 before FP1 allow remote authenticated users to cause a denial of service (instance crash) via a call to the (1) RECOVERJAR or (2) REMOVE_JAR procedure with a crafted parameter, related to (a) sqlj.install_jar and (b) sqlj.replace_jar.