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The correct answer is D.

OBJ-5.4: Each vulnerability mentioned poses a significant risk, but the greatest threat comes from the SQL injection. An SQL injection could allow an attacker to retrieve our data from the backend database directly. Using this technique, the attacker could also alter the data and put it back, and nobody would notice everything that had been changed, thereby also affecting our data integrity. The HTTP TRACE/TRACK methods are normally used to return the full HTTP request to the requesting client for proxy-debugging purposes and allow the attacker to access sensitive information in the HTTP headers. Since this only exposes information in the headers, it minimizes the risk to our system’s data confidentiality. An SSL server with SSLv3 enabled is not ideal since this is an older encryption type, but it still provides some confidentiality. The phpinfo information disclosure vulnerability prints out detailed information on both the system and the PHP configuration. This information by itself doesn’t disclose any information about the data stored within the system, though, so it isn’t a great threat to our data’s confidentiality.

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