- wlug - list.wlug.org.nz

Microsoft’s compiler-level Spectre fix shows how hard this problem will be to solve
by Peter Reutemann 14 Feb '18

14 Feb '18

'The Meltdown and Spectre attacks that use processor speculative execution to leak sensitive information have resulted in a wide range of software changes to try to limit the scope for harm. Many of these are operating system-level fixes, some of which depend on processor microcode updates. But Spectre isn't a simple attack to solve; operating system changes help a great deal, but application-level changes are also needed. Apple has talked about some of the updates it has made to the WebKit rendering engine, used in its Safari browser, but this is only a single application. Microsoft is offering a compiler-level change for Spectre. The "Spectre" label actually covers two different attacks. The one that Microsoft's compiler is addressing, known as "variant 1," concerns checking the size of an array: before accessing the Nth element of an array, code should check that the array has at least N elements in it. Programmers using languages like C and C++ often have to write these checks explicitly. Other languages, like JavaScript and Java, perform them automatically. Either way, the test has to be done; attempts to access array members that don't exist are a whole class of bugs all on their own. [...] In fairness, Microsoft does warn that "there is no guarantee that all possible instances of variant 1 will be instrumented," but as Kocher's examination shows, it's not simply that some Spectre-vulnerable code will escape the compiler's fixes. Much—and perhaps even most—Spectre-vulnerable code will escape. And even if it were only a few instances, bad guys would be able to locate the unprotected routines and focus their attacks accordingly.' -- source: https://arstechnica.com/gadgets/2018/02/microsofts-compiler-level-spectre-f… Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Would You Let A Site Mine Cryptocurrency In Return For Blocking Ads?
by Rowan Schischka 14 Feb '18

14 Feb '18

> What do you think: is it a fair trade? Not fair trade but fair game. The technology used is coinhive and anybody at any level of computer skill can block it. Firefox's noscript plugin and Pi-hole are both effective.

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Linux Journal: Best Linux Distribution
by Peter Reutemann 14 Feb '18

14 Feb '18

'We started things off with Best Linux Distribution, and nearly 10,000 readers voted. The winner was Debian, with many commenting "As for servers, Debian is still the best" or similar. One to watch that is rising in the polls is Manjaro (7 percent), which is independently based on the Arch Linux. Manjaro is a favorite for Linux newcomers and is known for its user-friendliness and accessibility. And, now for the top three LJ winners: Debian (33 percent), openSUSE (12 percent), and Fedora (11 percent).' -- source: https://linux.slashdot.org/story/18/02/14/1850259 Does anyone want to give Manjaro a spin at the next meeting? Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Would You Let A Site Mine Cryptocurrency In Return For Blocking Ads?
by Lawrence D'Oliveiro 14 Feb '18

14 Feb '18

This was inevitable, really. Salon.com <https://arstechnica.com/information-technology/2018/02/salon-to-ad-blockers…> now asks you, when it notices you are running an ad-blocker, if you would like to contribute some CPU to running a cryptocurrency miner for them instead. What do you think: is it a fair trade? Is it a sustainable revenue model, at least better than doing the mining without asking your permission?

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The Most Popular Linux Desktop Programs
by Peter Reutemann 14 Feb '18

14 Feb '18

'The most recent Linux Questions poll results are in. Steven J. Vaughan-Nichols, writing for ZDNet: LinuxQuestions, one of the largest internet Linux groups with 550,000 members, has just posted the results from its latest survey of desktop Linux users. In the always hotly-contested Linux desktop environment survey, the winner was the KDE Plasma Desktop. It was followed by the popular lightweight Xfce, Cinnamon, and GNOME. If you want to buy a computer with pre-installed Linux, the Linux Questions crew's favorite vendor by far was System76. Numerous other computer companies offer Linux on their PCs. These include both big names like Dell and dedicated small Linux shops such as ZaReason, Penguin Computing, and Emperor Linux. Many first choices weren't too surprising. For example, Linux users have long stayed loyal to the Firefox web browser, and they're still big fans. Firefox beat out Google Chrome by a five-to-one margin. And, as always, the VLC media player is far more popular than any other Linux media player. For email clients, Mozilla Thunderbird remains on top. That's a bit surprising given how Thunderbird's development has been stuck in neutral for some time now. When it comes to text editors, I was pleased to see vim -- my personal favorite -- win out over its perpetual rival, Emacs. In fact, nano and Kate both came ahead of Emacs.' -- source: https://linux.slashdot.org/story/18/02/13/1652238 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Active Browser Tabs Vs Active Browser Windows
by Lawrence D'Oliveiro 14 Feb '18

14 Feb '18

I have noticed some interesting behaviour with video playback on various websites, at least with Firefox. Videos on the NZ Herald website, for example, don’t start playing until the tab becomes the active one in the window. Also on YouTube, sometimes after an ad, there is a display inviting you to take part in some kind of survey. This displays for a fixed amount of time, but that time only accumulates while the tab is active -- make it inactive, and the time counter stops until it becomes active again. *But* ... the active tab is still considered to be active even if the window is not the frontmost one. This means if you want to do something else while waiting for a YouTube ad to finish playing (with the sound off, of course) and the extra display to disappear, you just have to do it in an entirely separate window.

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Facebook is Pushing Its Data-tracking Onavo VPN Within Its Main Mobile App
by Peter Reutemann 14 Feb '18

14 Feb '18

'Onavo Protect, the VPN client from the data-security app maker acquired by Facebook back in 2013, has now popped up in the Facebook app itself, under the banner "Protect" in the navigation menu. Clicking through on "Protect" will redirect Facebook users to the "Onavo Protect -- VPN Security" app's listing on the App Store. We're currently seeing this option on iOS only, which may indicate it's more of a test than a full rollout here in the U.S. Marketing Onavo within Facebook itself could lead to a boost in users for the VPN app, which promises to warn users of malicious websites and keep information secure as you browse. But Facebook didn't buy Onavo for its security protections. Instead, Onavo's VPN allow Facebook to monitor user activity across apps, giving Facebook a big advantage in terms of spotting new trends across the larger mobile ecosystem. For example, Facebook gets an early heads up about apps that are becoming breakout hits; it can tell which are seeing slowing user growth; it sees which apps' new features appear to be resonating with their users, and much more. Further reading: Do Not, I Repeat, Do Not Download Onavo, Facebook's Vampiric VPN Service (Gizmodo).' -- source: https://tech.slashdot.org/story/18/02/13/2026211 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Camera Makers Still Showing Zero Interest In Protecting Users With Built-In Encryption
by Lawrence D'Oliveiro 13 Feb '18

13 Feb '18

From <https://www.techdirt.com/articles/20180204/07404639150/camera-makers-still-…>: The Freedom of the Press Foundation sent a letter to major camera manufacturers in December 2016, letting them know filmmakers and journalists would appreciate a little assistance keeping their data out of governments' hands. ... We've covered many cases where police officers have seized phones/cameras and deleted footage captured by bystanders. ... Unfortunately, it doesn't look like camera manufacturers are considering offering encryption. The issue still doesn't even appear to be on their radar, more than a year after the Freedom of the Press Foundation's letter -- signed by 150 photographers and filmmakers -- indicated plenty of customers wanted better protection for their cameras. ... If a government can search something, it will. Encryption may not thwart all searches, but it will at least impede the most questionable ones.

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meeting next month
by Peter Reutemann 13 Feb '18

13 Feb '18

Hi everyone At the last meeting, Ian suggested to have cryptocurrencies (https://en.wikipedia.org/wiki/Cryptocurrency) as topic for our meeting next month. One aspect is the increasing amount of power that is consumed in order to mine "coins". The other interesting aspect introduced by, but not limit to, cryptocurrencies is the concept of the blockchain (https://en.wikipedia.org/wiki/Blockchain) an open, distributed ledger of transactions. Is there interest? Any volunteers to talk about something regarding this topic (history, current status, etc)? Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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That mega-vulnerability Cisco dropped is now under exploit
by Peter Reutemann 12 Feb '18

12 Feb '18

'Hackers are actively trying to exploit a high-severity vulnerability in widely used Cisco networking software that can give complete control over protected networks and access to all traffic passing over them, the company has warned. When Cisco officials disclosed the bug last week in a range of Adaptive Security Appliance products, they said they had no evidence anyone was actively exploiting it. Earlier this week, the officials updated their advisory to indicate that was no longer the case.' -- source: https://arstechnica.com/information-technology/2018/02/that-mega-vulnerabil… Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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