Thank you for reading the LinuxSecurity.com weekly security newsletter. The purpose of this document is to provide our readers with a quick summary of each week's most relevant Linux security headlines.

LinuxSecurity.com Feature Extras:

Password guessing with Medusa 2.0 - Medusa was created by the fine folks at foofus.net, in fact the much awaited Medusa 2.0 update was released in February of 2010. For a complete change log please visit

Password guessing as an attack vector - Using password guessing as an attack vector. Over the years we've been taught a strong password must be long and complex to be considered secure. Some of us have taken that notion to heart and always ensure our passwords are strong. But some don't give a second thought to the complexity or length of our password.

Flame worm was signed by forged Microsoft certificate (Jun 4)

Some components of the Flame spyware worm were signed using forged Microsoft certificates, according to a recent investigation by Microsoft. These unauthorised digital certificates allowed the Flame developers to make the malware appear as if it was actually created and approved by Microsoft.
(Jun 5)

The majority of IT and business professionals in large companies are no more than somewhat confident their security systems can detect a threat before it becomes a real problem, a study shows.
(Jun 4)

Future versions of Fedora could come with a bootloader that is signed by Microsoft, a move that would ensure that the Linux distribution is easy to install on computers with the secure boot mechanism. The proposal was described in a blog entry this week by Red Hat kernel developer Matthew Garrett.
Google Apps Security Beat By CloudFlare Hackers (Jun 5)

CloudFlare describes itself as a service that protects and accelerates any website, but even a company focused on security can be hacked. Last week, the company and its customer 4Chan, the infamous message board, was attacked by hacking group UGNazi.
(Jun 7)

Today's LinkedIn hack, exposing more than 6 million encrypted passwords, is more serious than it might appear and reveals one of the biggest security shortcomings social networks pose: Linked or shared data. Literally linked-in accounts expose information from others -- then there is the sheer amount of personal data hackers can siphon.
(Jun 5)

Last year, major internet service providers like Google, Facebook and Yahoo collaborated, for World IPv6 Day, in running their infrastructure on IPv4 and IPv6 in parallel. This year, for World IPv6 Launch Day, the companies plan to switch to this dual stack approach permanently. The motto this year being: "This time it is for real."
(Jun 6)

Security vendor Trusteer has found an underground tutorial that teaches hackers an easy way to bypass fraud detection systems used on many e-commerce and online banking sites.
'SwaggSec' claims hack of China Telecom, Warner Bros. (Jun 4)

A hacking group is claiming to have breached the networks of Warner Bros. and China Telecom, releasing documents and publishing login credentials.
(Jun 7)

An attack late last week that compromised the personal and business Gmail accounts of a web services company boss, revealed a subtle but dangerous security flaw in the two-factor authentication process used in Google Apps for business customers.
6.5M hashed LinkedIn passwords reportedly leaked, following app concerns (Jun 6)

It's been a tough morning for the professional network LinkedIn when it comes to security. A hacker has reportedly stolen and published around 6.5 million hashed passwords from the company, following security revelations regarding the way LinkedIn's mobile app handles your calendar data.
An Unofficial Guide to Hacking iPhones, iPads (Jun 6)

Want to learn how to remotely wipe address books and read private text messages on someone else's iPhone?
Hacktivists UGNazi attack 4chan, CloudFlare and Wounded Warrior Project (Jun 7)

After the FBI arrested Cosmo, the alleged leader of the UGNazi hacking group, the hackers attacked CloudFlare via a flaw in Google's two-factor authentication system. The CloudFlare hack allowed UGNazi to change the DNS for 4chan, so visitors to the site were redirected to a UGNazis Twitter account. The attack on the Wounded Warrior Project site was allegedly done for no reason but to spite The Jester.