: A SQL comment used to ignore the rest of the original query, preventing syntax errors.
: These CHR functions convert numeric ASCII values into characters to bypass security filters that might block specific words like "PIPE". 107 = k 72 = H 88 = X 67 = C Result: kHXC (the name of the pipe to listen to). : A SQL comment used to ignore the
: This is the timeout argument in seconds. If the database takes exactly 5 seconds to respond, it confirms to an attacker that the system is vulnerable to SQL injection. : This is the timeout argument in seconds
: A special dummy table in Oracle used for selecting results from functions that don't belong to a specific table. If you encountered this in a log or
If you encountered this in a log or a search field, it is likely an automated probe by a security scanner or an attacker trying to identify vulnerabilities. CHR - Oracle Help Center
: An Oracle subprogram typically used for communication between database sessions.