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Security

Ask Slashdot: How Are You Responding To Cloudbleed? (reuters.com) 59

An anonymous IT geek writes: Cloudflare-hosted web sites have been leaking data as far back as September, according to Gizmodo, which reports that at least Cloudflare "acted fast" when the leak was discovered, closing the hole within 44 minutes, and working with search engines to purge their caches. (Though apparently some of it is still lingering...) Cloudflare CEO Matthew Prince "claims that there was no detectable uptick in requests to Cloudflare-powered websites from September of last year...until today. That means the company is fairly confident hackers didn't discover the vulnerability before Google's researchers did."

And the company's CTO also told Reuters that "We've seen absolutely no evidence that this has been exploited. It's very unlikely that someone has got this information... We do not know of anybody who has had a security problem as a result of this." Nevertheless, Fortune warns that "So many sites were vulnerable that it doesn't make sense to review the list and change passwords on a case-by-case basis." Some sites are now even resetting every user's password as a precaution, while site operators "are also being advised to wipe their sites' cookies and security certificates, and perform their own web searches to see if site data leaked." But I'd like to know what security precautions are being taken by Slashdot's readers?

Leave your own answers in the comments. How did you respond to Cloudbleed?
Open Source

Linus Torvalds On Git's Use Of SHA-1: 'The Sky Isn't Falling' (zdnet.com) 127

Google's researchers specifically cited Git when they announced a new SHA-1 attack vector, according to ZDNet. "The researchers highlight that Linus Torvald's code version-control system Git 'strongly relies on SHA-1' for checking the integrity of file objects and commits. It is essentially possible to create two Git repositories with the same head commit hash and different contents, say, a benign source code and a backdoored one,' they note." Saturday morning, Linus responded: First off - the sky isn't falling. There's a big difference between using a cryptographic hash for things like security signing, and using one for generating a "content identifier" for a content-addressable system like git. Secondly, the nature of this particular SHA1 attack means that it's actually pretty easy to mitigate against, and there's already been two sets of patches posted for that mitigation. And finally, there's actually a reasonably straightforward transition to some other hash that won't break the world - or even old git repositories...

The reason for using a cryptographic hash in a project like git is because it pretty much guarantees that there is no accidental clashes, and it's also a really really good error detection thing. Think of it like "parity on steroids": it's not able to correct for errors, but it's really really good at detecting corrupt data... if you use git for source control like in the kernel, the stuff you really care about is source code, which is very much a transparent medium. If somebody inserts random odd generated crud in the middle of your source code, you will absolutely notice... It's not silently switching your data under from you... And finally, the "yes, git will eventually transition away from SHA1". There's a plan, it doesn't look all that nasty, and you don't even have to convert your repository. There's a lot of details to this, and it will take time, but because of the issues above, it's not like this is a critical "it has to happen now thing".

In addition, ZDNet reports, "Torvalds said on a mailing list yesterday that he's not concerned since 'Git doesn't actually just hash the data, it does prepend a type/length field to it', making it harder to attack than a PDF... Do we want to migrate to another hash? Yes. Is it game over for SHA-1 like people want to say? Probably not."
Bug

Severe IE 11 Bug Allows 'Persistent JavaScript' Attacks (bleepingcomputer.com) 68

An anonymous reader writes: New research published today shows how a malicious website owner could show a constant stream of popups, even after the user has left his site, or even worse, execute any kind of persistent JavaScript code while the user is on other domains. In an interview, the researcher who found these flaws explains that this flaw is an attacker's dream, as it could be used for: ad fraud (by continuing to load ads even when the user is navigating other sites), zero-day attacks (by downloading exploit code even after the user has left the page), tech support scams (by showing errors and popups on legitimate and reputable sites), and malvertising (by redirecting users later on, from other sites, even if they leave the malicious site too quickly).

This severe flaw in the browser security model affects only Internet Explorer 11, which unfortunately is the second most used browser version, after Chrome 55, with a market share of over 10%. Even worse for IE11 users, there's no fix available for this issue because the researcher has decided to stop reporting bugs to Microsoft after they've ignored many of his previous reports. For IE11 users, a demo page is available here.

Social Networks

Are Your Slack Conversations Really Private and Secure? (fastcompany.com) 57

An anonymous reader writes: "Chats that seem to be more ephemeral than email are still being recorded on a server somewhere," reports Fast Company, noting that Slack's Data Request Policy says the company will turn over data from customers when "it is compelled by law to do so or is subject to a valid and binding order of a governmental or regulatory body...or in cases of emergency to avoid death or physical harm to individuals." Slack will notify customers before disclosure "unless Slack is prohibited from doing so," or if the data is associated with "illegal conduct or risk of harm to people or property."

The article also warns that like HipChat and Campfire, Slack "is encrypted only at rest and in transit," though a Slack spokesperson says they "may evaluate" end-to-end encryption at some point in the future. Slack has no plans to offer local hosting of Slack data, but if employers pay for a Plus Plan, they're able to access private conversations.

Though Slack has 4 million users, the article points out that there's other alternatives like Semaphor and open source choices like Wickr and Mattermost. I'd be curious to hear what Slashdot readers are using at their own workplaces -- and how they feel about the privacy and security of Slack?
Security

Java and Python FTP Attacks Can Punch Holes Through Firewalls (csoonline.com) 14

"The Java and Python runtimes fail to properly validate FTP URLs, which can potentially allow attackers to punch holes through firewalls to access local networks," reports CSO Online. itwbennett writes: Last weekend security researcher Alexander Klink disclosed an interesting attack where exploiting an XML External Entity vulnerability in a Java application can be used to send emails. At the same time, he showed that this type of vulnerability can be used to trick the Java runtime to initiate FTP connections to remote servers. After seeing Klink's exploit, Timothy Morgan, a researcher with Blindspot Security, decided to disclose a similar attack that works against both Java's and Python's FTP implementations. "But his attack is more serious because it can be used to punch holes through firewalls," writes Lucian Constantin in CSO Online.
"The Java and Python developers have been notified of this problem, but until they fix their FTP client implementations, the researcher advises firewall vendors to disable classic mode FTP translation by default..." reports CSO Online. "It turns out that the built-in implementation of the FTP client in Java doesn't filter out special carriage return and line feed characters from URLs and actually interprets them. By inserting such characters in the user or password portions of an FTP URL, the Java FTP client can be tricked to execute rogue commands..."
Botnet

World's Largest Spam Botnet Adds DDoS Feature (bleepingcomputer.com) 26

An anonymous reader writes from a report via BleepingComputer: Necurs, the world's largest spam botnet with nearly five million infected bots, of which one million are active each day, has added a new module that can be used for launching DDoS attacks. The sheer size of the Necurs botnet, even in its worst days, dwarfs all of today's IoT botnets. The largest IoT botnet ever observed was Mirai Botnet #14 that managed to rack up around 400,000 bots towards the end of 2016 (albeit the owner of that botnet has now been arrested). If this new feature were to ever be used, a Necurs DDoS attack would easily break every DDoS record there is. Fortunately, no such attack has been seen until now. Until now, the Necurs botnet has been seen spreading the Dridex banking trojan and the Locky ransomware. According to industry experts, there's a low chance we'd see the Necurs botnet engage in DDoS attacks because the criminal group behind the botnet is already making too much money to risk exposing their full infrastructure in DDoS attacks.
Government

FCC To Halt Rule That Protects Your Private Data From Security Breaches (arstechnica.com) 116

According to Ars Technica, "The Federal Communications Commission plans to halt implementation of a privacy rule that requires ISPs to protect the security of its customers' personal information." From the report: The data security rule is part of a broader privacy rulemaking implemented under former Chairman Tom Wheeler but opposed by the FCC's new Republican majority. The privacy order's data security obligations are scheduled to take effect on March 2, but Chairman Ajit Pai wants to prevent that from happening. The data security rule requires ISPs and phone companies to take "reasonable" steps to protect customers' information -- such as Social Security numbers, financial and health information, and Web browsing data -- from theft and data breaches. The rule would be blocked even if a majority of commissioners supported keeping them in place, because the FCC's Wireline Competition Bureau can make the decision on its own. That "full commission vote on the pending petitions" could wipe out the entire privacy rulemaking, not just the data security section, in response to petitions filed by trade groups representing ISPs. That vote has not yet been scheduled. The most well-known portion of the privacy order requires ISPs to get opt-in consent from consumers before sharing Web browsing data and other private information with advertisers and other third parties. The opt-in rule is supposed to take effect December 4, 2017, unless the FCC or Congress eliminates it before then. Pai has said that ISPs shouldn't face stricter rules than online providers like Google and Facebook, which are regulated separately by the Federal Trade Commission. Pai wants a "technology-neutral privacy framework for the online world" based on the FTC's standards. According to today's FCC statement, the data security rule "is not consistent with the FTC's privacy standards."
Government

Security Lapse Exposed New York Airport's Critical Servers For a Year (zdnet.com) 42

An anonymous reader quotes a report from ZDNet: A security lapse at a New York international airport left its server backups exposed on the open internet for almost a year, ZDNet has found. The internet-connected storage drive contained several backup images of servers used by Stewart International Airport, but neither the backup drive nor the disk images were password protected, allowing anyone to access their contents. Since April last year, the airport had been inadvertently leaking its own highly-sensitive files as a result of the drive's misconfiguration. Vickery, who also posted an analysis of his findings, said the drive "was, in essence, acting as a public web server" because the airport was backing up unprotected copies of its systems to a Buffalo-branded drive, installed by a contract third-party IT specialist. When contacted Thursday, the contractor dismissed the claims and would not comment further. Though the listing still appears on Shodan, the search engine for unprotected devices and databases, the drive has since been secured. The files contained eleven disk images, accounting for hundreds of gigabytes of files and folders, which when mounted included dozens of airport staff email accounts, sensitive human resources files, interoffice memos, payroll data, and what appears to be a large financial tracking database. Many of the files we reviewed include "confidential" internal airport documents, which contain schematics and details of other core infrastructure.
Apple

Treasure Trove of Internal Apple Memos Discovered in Thrift Store (gizmodo.com) 28

An anonymous reader shares a Gizmodo report: Peeking inside a book bin at a Seattle Goodwill, Redditor vadermeer caught an interesting, unexpected glimpse into the early days of Apple: a cache of internal memos, progress reports, and legal pad scribbles from 1979 and 1980, just three years into the tech monolith's company history. The documents at one point belonged to Jack MacDonald -- then the manager of systems software for the Apple II and III (in these documents referred to by its code name SARA). The papers pertain to implementation of Software Security from Apple's Friends and Enemies (SSAFE), an early anti-piracy measure. Not much about MacDonald exists online, and the presence of his files in a thrift store suggests he may have passed away, though many of the people included in these documents have gone on to long and lucrative careers. The project manager on SSAFE for example, Randy Wigginton, was Apple's sixth employee and has since worked for eBay, Paypal, and (somewhat tumultuously) Google. Apple co-founder Steve Wozniak also features heavily in the implementation of these security measures.
Bug

Cloudflare Leaks Sensitive User Data Across the Web (theregister.co.uk) 85

ShaunC writes: In a bug that's been christened "Cloudbleed," Cloudflare disclosed today that some of their products accidentally exposed private user information from a number of websites. Similar to 2014's Heartbleed, Cloudflare's problem involved a buffer overrun that allowed uninitialized memory contents to leak into normal web traffic. Tavis Ormandy, of Google's Project Zero, discovered the flaw last week. Affected sites include Uber, Fitbit, and OK Cupid, as well as unnamed services for hotel booking and password management. Cloudflare says the bug has been fixed, and Google has purged affected pages from its search index and cache. Further reading: The Register, Ars Technica
Privacy

Judge Rules Against Forced Fingerprinting (thestack.com) 126

An anonymous reader quotes a report from The Stack: A federal judge in Chicago has ruled against a government request which would require forced fingerprinting of private citizens in order to open a secure, personal phone or tablet. In the ruling, the judge stated that while fingerprints in and of themselves are not protected, the government's method of obtaining the fingerprints would violate the Fourth and Fifth amendments. The government's request was given as part of a search warrant related to a child pornography ring. The court ruled that the government could seize devices, but that it could not compel people physically present at the time of seizure to provide their fingerprints "onto the Touch ID sensor of any Apple iPhone, iPad, or other Apple brand device in order to gain access to the contents of any such device." The report mentions that the ruling was based on three separate arguments. "The first was that the boilerplate language used in the request was dated, and did not, for example, address vulnerabilities associated with wireless services. Second, the court said that the context in which the fingerprints were intended to be gathered may violate the Fourth Amendment search and seizure rights of the building residents and their visitors, all of whom would have been compelled to provide their fingerprints to open their secure devices. Finally, the court noted that historically the Fifth Amendment, which protects against self-incrimination, does not allow a person to circumvent the fingerprinting process." You can read more about the ruling via Ars Technica.
Iphone

Cellebrite Can Now Unlock Apple iPhone 6, 6 Plus (cyberscoop.com) 103

Patrick O'Neill writes: A year after the battle between the FBI and Apple over unlocking an iPhone 5c used by a shooter in the San Bernardino terrorist attack, smartphone cracking company Cellebrite announced it can now unlock the iPhone 6 and 6 Plus for customers at rates ranging from $1,500 to $250,000. The company's newest products also extract and analyze data from a wide range of popular apps including all of the most popular secure messengers around. From the Cyberscoop report: "Cellebrite's ability to break into the iPhone 6 and 6 Plus comes in their latest line of product releases. The newest Cellebrite product, UFED 6.0, boasts dozens of new and improved features including the ability to extract data from 51 Samsung Android devices including the Galaxy S7 and Galaxy S7 Edge, the latest flagship models for Android's most popular brand, as well as the new high-end Google Pixel Android devices."
Google

Google Has Demonstrated a Successful Practical Attack Against SHA-1 (googleblog.com) 138

Reader Artem Tashkinov writes: Ten years after of SHA-1 was first introduced, Google has announced the first practical technique for generating an SHA-1 collision. It required two years of research between the CWI Institute in Amsterdam and Google. As a proof of the attack, Google has released two PDF files that have identical SHA-1 hashes but different content. The amount of computations required to carry out the attack is staggering: nine quintillion (9,223,372,036,854,775,808) SHA1 computations in total which took 6,500 years of CPU computation to complete the attack first phase and 110 years of GPU computation to complete the second phase.

Google says that people should migrate to newer hashing algorithms like SHA-256 and SHA-3, however it's worth noting that there are currently no ways of finding a collision for both MD5 and SHA-1 hashes simultaneously which means that we still can use old proven hardware accelerated hash functions to be on the safe side.

Facebook

'Social Media Needs A Travel Mode' (idlewords.com) 143

Maciej CegÅowski, a Polish-American web developer, entrepreneur, and social critic, writes on a blog post: We need a 'trip mode' for social media sites that reduces our contact list and history to a minimal subset of what the site normally offers. Not only would such a feature protect people forced to give their passwords at the border, but it would mitigate the many additional threats to privacy they face when they use their social media accounts away from home. Both Facebook and Google make lofty claims about user safety, but they've done little to show they take the darkening political climate around the world seriously. A 'trip mode' would be a chance for them to demonstrate their commitment to user safety beyond press releases and anodyne letters of support. What's required is a small amount of engineering, a good marketing effort, and the conviction that any company that makes its fortune hoarding user data has a moral responsibility to protect its users. To work effectively, a trip mode feature would need to be easy to turn on, configurable (so you can choose how long you want the protection turned on for) and irrevocable for an amount of time chosen by the user once it's set. There's no sense in having a 'trip mode' if the person demanding your password can simply switch it off, or coerce you into switching it off.
Google

Google Releases an AI Tool For Publishers To Spot and Weed Out Toxic Comments (bbc.com) 194

Google today launched a new technology to help news organizations and online platforms identify and swiftly remove abusive comments on their websites. The technology, called Perspective, will review comments and score them based on how similar they are to comments people said were "toxic" or likely to make them leave a conversation. From a report on BBC: The search giant has developed something called Perspective, which it describes as a technology that uses machine learning to identify problematic comments. The software has been developed by Jigsaw, a division of Google with a mission to tackle online security dangers such as extremism and cyberbullying. The system learns by seeing how thousands of online conversations have been moderated and then scores new comments by assessing how "toxic" they are and whether similar language had led other people to leave conversations. What it's doing is trying to improve the quality of debate and make sure people aren't put off from joining in.
Security

Software Vendor Who Hid 'Supply Chain' Breach Outed (krebsonsecurity.com) 51

tsu doh nimh writes: Researchers at RSA released a startling report last week that detailed a so-called "supply chain" malware campaign that piggybacked on a popular piece of software used by system administrators at some of the nation's largest companies. This intrusion would probably not be that notable if the software vendor didn't have a long list of Fortune 500 customers, and if the attackers hadn't also compromised the company's update servers -- essentially guaranteeing that customers who downloaded the software prior to the breach were infected as well. Incredibly, the report did not name the affected software, and the vendor in question has apparently chosen to bury its breach disclosure as a page inside of its site -- not linking to it anywhere. Brian Krebs went and dug it up. Spoiler: the product/vendor in question is EVlog by Altair Technologies Ltd.
United States

Americans at Risk of Identity Theft as They File their Tax Returns (betanews.com) 77

Ian Barker, writing for BetaNews: As we move into the tax return season a new study reveals that attitudes to identity theft and a pattern of poor practices are leaving much of the public vulnerable. Data security and ID theft protection company CyberScout has carried out its second annual Tax Season Risk Report and finds 58 percent of Americans are not worried about tax fraud in spite of federal reports of 787,000 confirmed identity theft returns in 2016, totaling more than $4 billion in potential fraud. Among other findings are that only 35 percent of taxpayers demand that their preparers use two-factor authentication to protect their clients' personal information. Less than a fifth (18 percent) use an encrypted USB drive to save important documents like tax worksheets, W-2s, 1099s or 1040s. And another 38 percent either store tax documents on their computer's hard drive or in the cloud, approaches that are susceptible to a variety of hacks.
Privacy

GE, Intel, and AT&T Are Putting Cameras and Sensors All Over San Diego (fortune.com) 125

An anonymous reader shares a Fortune report: General Electric will put cameras, microphones, and sensors on 3,200 street lights in San Diego this year, marking the first large-scale use of "smart city" tools GE says can help monitor traffic and pinpoint crime, but raising potential privacy concerns. Based on technology from GE's Current division, Intel and AT&T, the system will use sensing nodes on light poles to locate gunshots, estimate crowd sizes, check vehicle speeds and other tasks, GE and the city said on Wednesday. The city will provide the data to entrepreneurs and students to develop applications. Companies expect a growing market for such systems as cities seek better data to plan and run their operations. San Diego is a test of "Internet of things" technology that GE Current provides for commercial buildings and industrial sites.
United States

US Homeland Security Employees Locked Out of Computer Networks (reuters.com) 133

Dustin Volz, reporting for Reuters: Some U.S. Department of Homeland Security employees in the Washington area and Philadelphia were unable to access some agency computer networks on Tuesday, according to three sources familiar with the matter. It was not clear how widespread the issue was or how significantly it affected daily functions at DHS, a large government agency whose responsibilities include immigration services, border security and cyber defense. In a statement, a DHS official confirmed a network outage that temporarily affected four U.S. Citizenship and Immigration Services (USCIS) facilities in the Washington area due to an "expired DHS certificate." Reuters first reported the incident earlier Tuesday, which a source familiar with the matter said also affected a USCIS facility in Philadelphia. Employees began experiencing problems logging into networks Tuesday morning due to a problem related to domain controllers, or servers that process authentication requests, which could not validate personal identity verification (PIV) cards used by federal workers and contractors to access certain information systems, according to the source.
Google

Google Releases Open Source File Sharing Project 'Upspin' On GitHub (betanews.com) 57

BrianFagioli quotes a report from BetaNews: Today, Google unveiled yet another way to share files. Called "Upspin," the open source project aims to make sharing easier for home users. With that said, the project does not seem particularly easy to set up or maintain. For example, it uses Unix-like directories and email addresses for permissions. While it may make sense to Google engineers, I am dubious that it will ever be widely used. "Upspin looks a bit like a global file system, but its real contribution is a set of interfaces, protocols, and components from which an information management system can be built, with properties such as security and access control suited to a modern, networked world. Upspin is not an "app" or a web service, but rather a suite of software components, intended to run in the network and on devices connected to it, that together provide a secure, modern information storage and sharing network," says Google. The search giant adds: "Upsin is a layer of infrastructure that other software and services can build on to facilitate secure access and sharing. This is an open source contribution, not a Google product. We have not yet integrated with the Key Transparency server, though we expect to eventually, and for now use a similar technique of securely publishing all key updates. File storage is inherently an archival medium without forward secrecy; loss of the user's encryption keys implies loss of content, though we do provide for key rotation."

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