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Security breach that exposed 114,000 e-mail addresses traced back to "self-described hackers"
AT&T sent an e-mail on Sunday night to owners of the iPad 3G, notifying them of a security breach that struck the company's site and offering an explanation for how it happened.
The e-mail, signed by Dorothy Attwood, a senior vice president and public policy and chief privacy officer for AT&T, offers some insight into how more than 114,000 iPad owners' e-mail addresses and SIM card serial numbers (ICC-IDs) were exposed via a hole in the AT&T Web site.
The "self-described hackers" Attwood describes in the e-mail, Goatse Security, "deliberately went to great efforts" to successfully gain access to sensitive user data and then published a list of the e-mails precisely to make the noise in the media that has so far been generated.
Even the FBI got involved, announcing on Thursday morning that it was investigating the breach as a "potential cyberthreat."
Goatse responded to AT&T's message with the claim that "all data was gathered from a public webserver with no password, accessible by anyone on the Internet," arguing that such holes need to be made public to ensure they are patched.
AT&T told iPad users that it has sealed the hole to prevent further exposure of private customer information and promises that only e-mail addresses and ICC-IDs were discovered. According to the company, no user was ever at risk of having a hacker gain access to his or her password, account information, e-mail contents, or any other personal information.
This security breach struck even a few publicly visible iPad users: White House Chief of Staff Rahm Emanuel, journalist Diane Sawyer, New York Mayor Michael Bloomberg, movie producer Harvey Weinstein, and New York Times CEO Janet Robinson.
Here's the letter in full:
June 13, 2010
Dear Valued AT&T Customer,
Recently there was an issue that affected some of our customers with AT&T 3G service for iPad resulting in the release of their customer email addresses. I am writing to let you know that no other information was exposed and the matter has been resolved. We apologize for the incident and any inconvenience it may have caused. Rest assured, you can continue to use your AT&T 3G service on your iPad with confidence.
Here’s some additional detail:
On June 7 we learned that unauthorized computer “hackers” maliciously exploited a function designed to make your iPad log-in process faster by pre-populating an AT&T authentication page with the email address you used to register your iPad for 3G service. The self-described hackers wrote software code to randomly generate numbers that mimicked serial numbers of the AT&T SIM card for iPad – called the integrated circuit card identification (ICC-ID) – and repeatedly queried an AT&T web address. When a number generated by the hackers matched an actual ICC-ID, the authentication page log-in screen was returned to the hackers with the email address associated with the ICC-ID already populated on the log-in screen.
The hackers deliberately went to great efforts with a random program to extract possible ICC-IDs and capture customer email addresses. They then put together a list of these emails and distributed it for their own publicity.
As soon as we became aware of this situation, we took swift action to prevent any further unauthorized exposure of customer email addresses. Within hours, AT&T disabled the mechanism that automatically populated the email address. Now, the authentication page log-in screen requires the user to enter both their email address and their password.
I want to assure you that the email address and ICC-ID were the only information that was accessible. Your password, account information, the contents of your email, and any other personal information were never at risk. The hackers never had access to AT&T communications or data networks, or your iPad. AT&T 3G service for other mobile devices was not affected.
While the attack was limited to email address and ICC-ID data, we encourage you to be alert to scams that could attempt to use this information to obtain other data or send you unwanted email. You can learn more about phishing by visiting the AT&T website.
AT&T takes your privacy seriously and does not tolerate unauthorized access to its customers’ information or company websites. We will cooperate with law enforcement in any investigation of unauthorized system access and to prosecute violators to the fullest extent of the law.
AT&T acted quickly to protect your information – and we promise to keep working around the clock to keep your information safe. Thank you very much for your understanding, and for being an AT&T customer.
Senior Vice President, Public Policy and Chief Privacy Officer for AT&T
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