U.S. Postal Service just fixed a security weakness that allowed anyone who has an account at usps.com to view account details for some 60 million other users, and in some cases to modify account details on their behalf.
KrebsOnSecurity was contacted last week by a researcher who discovered the problem, but who asked to remain anonymous. The researcher said he informed the USPS about his finding more than a year ago yet never received a response. After confirming his findings, this author contacted the USPS, which promptly addressed the issue.
The problem stemmed from an authentication weakness in a USPS Web component known as an “application program interface,” or API — basically, a set of tools defining how various parts of an online application such as databases and Web pages should interact with one another.