Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Concept explainers

Concurrency Control
The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for …
Question

Classify each of the following vulnerabilities using the PA model. Assume that the classification is
for the implementation level. Remember to justify your answers.
(a) The presence of the “wiz” command in the sendmail program 
(b) The failure to handle the IFS shell variable by loadmodule 
(c) The failure to select an Administrator password that was difficult to guess 
(d) The failure of the Burroughs system to detect offline changes to files

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