According to the breach notification service LeakedSource roughly 43 million Last.fm accounts were compromised in a 2012 incident.
In June 2012, the online music service Last.fm was compromised by hackers, in response the company notified the incident to its users inviting them to change their passwords.
Some experts speculated the security breach took place several months earlier.
The company was using the MD5 hashing algorithm with no salt to protect passwords, which is known to be weak security implementation, for this reason, Last.fm also announced some improvements for the storage of the passwords.
“We are currently investigating the leak of some Last.fm user passwords. This follows recent password leaks on other sites, as well as information posted online. As a precautionary measure, we’re asking all our users to change their passwords immediately.” states the Last.fm Password Security Update.
“We strongly recommend that your new Last.fm password is different to the password you use on other services.”
The real number of impacted users was not disclosed at the time of the data breach, but now we know more about the incident. According to the breach notification service LeakedSource roughly 43 million accounts were compromised in the incident.
The leaked records include usernames, passwords, email addresses, dates of registration and some other internal data.
“Music service Last.fm was hacked on March 22nd, 2012 for a total of 43,570,999 users. This data set was provided to us by firstname.lastname@example.org and Last.fm already knows about the breach but the data is just becoming public now like all the others.” reported LeakedSource.
“Each record contains a username, email address, password, join date, and some other internal data. We verified the legitimacy of this data set with Softpedia reporter Catalin C who was in the breach himself along with his colleagues.”
According to LeakedSource, its experts managed to crack 96 percent of the unsalted MD5 hashes within a couple of hours.
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines.
Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.