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itwbennett writes In a blog post Tuesday, security service provider Alert Logic warned of a Linux vulnerability, named grinch after the well-known Dr. Seuss character, that could provide attackers with unfettered root access. The fundamental flaw resides in the Linux authorization system, which can inadvertently allow privilege escalation, granting a user full administrative access. Alert Logic warned that Grinch could be as severe as the Shellshock flaw that roiled the Internet in September. Update: 12/19 04:47 GMT by S : Reader deathcamaro points out that Red Hat and others say this is not a flaw at all, but expected behavior.

another random user writes "A researcher by the name of Suriya Prakash has claimed that the majority of phone numbers on Facebook are not safe. It's not clear where he got his numbers from (he says 98 percent, while another time he says 500 million out of Facebook's 600 million mobile users), but his demonstration certainly showed he could collect countless phone numbers and their corresponding Facebook names with very little effort. Facebook has confirmed that it limited Prakash's activity but it's unclear how long it took to do so. Prakash disagrees with when Facebook says his activity was curtailed." Update: 10/11 17:47 GMT by T : Fred Wolens of Facebook says this isn't an exploit at all, writing "The ability to search for a person by phone number is intentional behavior and not a bug in Facebook. By default, your privacy settings allow everyone to find you with search and friend finder using the contact info you have provided, such as your email address and phone number. You can modify these settings at any time from the Privacy Settings page. Facebook has developed an extensive system for preventing the malicious usage of our search functionality and the scenario described by the researcher was indeed rate-limited and eventually blocked." Update: 10/11 20:25 GMT by T : Suriya Prakash writes with one more note: "Yes, it is a feature of FB and not a bug.but FB never managed to block me; the vul was in m.facebook.com. Read my original post. Many other security researchers also confirmed the existence of this bug; FB did not fix it until all the media coverage." Some of the issue is no doubt semantic; if you have a Facebook account that shows your number, though, you can decide how much you care about the degree to which the data is visible or findable.

swandives writes "There's lot of talk about Facebook and privacy at the moment, but a bug in Facebook's website lets hackers delete Facebook friends without permission. Steven Abbagnaro, a student from Marist College in Poughkeepsie, New York, reported the flaw, writing proof-of-concept code that scrapes publicly available data from users' Facebook pages and deletes all of their friends, one by one. The victim first has to click on a malicious link while logged into Facebook. Abbagnaro's code exploits the same underlying flaw that was first reported by Alert Logic security analyst M.J. Keith who discovered a cross-site request forgery bug, where the website doesn't properly check code sent by users' browsers to ensure that they were authorized to make changes on the site."