Krishna Dagli writes to tell us of an investigation, by Michael Sutton, attempting to get an estimate of how widespread SQL-injection vulnerabilities are among Web sites. Sutton made clever use of the Google API to turn up candidate vulnerable sites. You might quibble with his methodology (some posters on the blog site do), but he found that around 11% of sites are potentially vulnerable to SQL injection attacks. He believes the causes for this somewhat alarming situation include development texts that teach programmers insecure SQL syntax, and point-and-click tools that allow the untrained to put up database-backed sites.
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