Typical Security Review Failure Rates
Study of 300 applications the first application security review almost always (92%) resulted in failure. Typically my review was the first time the application had been reviewed for security. After a few weeks to implement process changes and fix bugs a second review resulted in reducing the failure rate to 20%.
A third round of reviews did show additional applications could pass, but it highlighted SDL and systematic issues in about 8% of all organizations.
Key take-aways 1) Applications that have not considered security are almost always insecure, this is what the press loves to report. 2) Most applications can readily adapt process changes to be secure, this is the security vendors little secret. 3) Around 10% of organizations have difficulty with implementing the required process changes, there are a variety of factors that I would be happy to disucss with you in more detail.
Original paper based on my work for Watchfire: