- wlug - list.wlug.org.nz

Digital Signage Moving To Linux?
by Lawrence D'Oliveiro 28 May '20

28 May '20

The Register regularly collects reports of computer-controlled public signage malfunctioning in an amusing way. In this latest instalment <https://www.theregister.co.uk/2020/05/27/bork/>, there is an interesting mention: The company went on to tell us that the units run Windows 10, but "we're about to upgrade all of our production machines to a custom Linux build to improve their stability and generally operate with more efficiency." One of the reader comments mentions a company called “Screenly”, which offers a product in both open-source and proprietary-paid forms.

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meeting next month
by Peter Reutemann 28 May '20

28 May '20

Hi everyone Just got contacted by the timetabling people that look after the room bookings for WLUG (and also Python). No evening bookings are allowed till the campus fully operational again. At least the June meetings will be virtual ones again. Having said that, would you like to present something during June? Then please contact me (can be off-list). :-) 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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Choosing 2FA authenticator apps can be hard. Ars did it so you don’t have to
by Peter Reutemann 28 May '20

28 May '20

'Last year, Sergio Caltagirone found himself in a tough spot. While traveling, his phone broke and stopped working completely. With no access to his Google and Microsoft authenticator apps, he lost access to two-factor authentication when he needed it most—when he was logging in from IP addresses not recognized by the 30 to 40 sites he had enrolled. “I had a whole bunch of sites [that] I had to go through a massively long account restoration process because I lost my 2FA,” said Caltagirone, who is senior VP of threat intelligence at security firm Dragos. “Every time, I had to contact customer service. I had different levels of requirements I had to go through for them to effectively disable 2FA on my account. Some required address verification. [For others,] I had to send a last bill. The number of those I went through was just insane.” The experience shows the double-edged sword of multi-factor authentication. Requiring users to enter a password that’s pseudorandomly generated every 30 seconds makes account takeovers significantly harder, even when an attacker has phished or otherwise obtained the password. But in the event that second factor (in this case, the “something you have,” that is, the phone) isn’t available, that same protection can block legitimate users from logging in for unacceptably long periods of time. When Caltagirone relayed his experience last September, a quick survey of the available consumer and small-business authenticators left much to be desired. Only a few of them made it possible to back up the unique cryptographic seeds that each phone uses to generate a time-based one-time password, or TOTP. Websites—including Google, Github, Facebook, and hundreds of others that implement the Time-Based One-Time Password Algorithm standard—require the temporary password to log in users who opt in to 2FA. The result? When your device was stolen, lost, or stopped working, you had to go through the same painful and time-consuming account recoveries Caltagirone did. The lack of a backup and recovery mechanism meant the only viable way to hedge against a device loss or malfunction was to print, scan, or photograph each QR code or the underlying Web link (for instance, http://USERNAME(a)salesforce.com/?secret=LZZIKRWX736EH2IQ&issuer=Slack) it represented. That was time consuming. Even worse, it was cumbersome and insecure to store them, particularly when traveling.' -- source: https://arstechnica.com/information-technology/2020/05/choosing-2fa-authent… 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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OpenSSH To Deprecate SHA-1 Logins Due To Security Risk
by Peter Reutemann 28 May '20

28 May '20

'OpenSSH, the most popular utility for connecting to and managing remote servers, has announced today plans to drop support for its SHA-1 authentication scheme. From a report: The OpenSSH team cited security concerns with the SHA-1 hashing algorithm, currently considered insecure. The algorithm was broken in a practical, real-world attack in February 2017, when Google cryptographers disclosed SHAttered, a technique that could make two different files appear as they had the same SHA-1 file signature. At the time, creating an SHA-1 collision was considered computationally expensive, and Google experts thought SHA-1 could still be used in practice for at least half a decade until the cost would go down. However, subsequent research released in May 2019 and in January 2020, detailed an updated methodology to cut down the cost of an SHA-1 chosen-prefix collision attack to under $110,000 and under $50,000, respectively. ' -- source: https://it.slashdot.org/story/20/05/27/1830211 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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“Tech’s Volkswagen Moment”
by Lawrence D'Oliveiro 27 May '20

27 May '20

Love the use of the phrase “Volkwagen moment”. A researcher investigating Trend Micro’s antimalware software <https://www.theregister.co.uk/2020/05/20/trend_accused_microsoft_cheating/> has discovered a routine in it which appears to be able to tell when the software is running within Microsoft’s WHQL test suite, so the code can behave one way during testing and certification, and a different way while running on ordinary punters’ PCs. Trend Micro’s response seems to be trying to have it both ways, on the one hand denying it is doing such a thing, on the other trying to cast aspersions on the researcher for going public without contacting them first. But as a reader comment <https://forums.theregister.co.uk/forum/all/2020/05/20/trend_accused_microso…> points out, such a “responsible-disclosure” process is supposed to apply to security bugs. However, this appears to be a deliberate feature.

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India Open Sources Its Contact-Tracing App
by Peter Reutemann 27 May '20

27 May '20

'India has released the source code of its contact-tracing app, Aarogya Setu, to the relief of privacy and security experts who have been advocating for this ever since the app launched in early April. >From a report: Ministry of Electronics and Information Technology Secretary Ajay Prakash Sawhney made the announcement on Tuesday, dubbing the move "opening the heart" of the Aarogya Setu app to allow engineers to inspect and tinker with the code. The app has amassed over 114 million users in less than two months -- an unprecedented scale globally. The source code of Aarogya Setu's Android app is live on GitHub with code of iOS and KaiOS apps slated to release in a "few weeks." Nearly 98% of the app's users are on the Android platform. Sawhney said the government will also offer cash prizes of up to $1,325 to security experts for identifying and reporting bugs and vulnerabilities. "Open-sourcing Aarogya Setu is a unique feat for India. No other government product anywhere in the world has been open-sourced at this scale," said Amitabh Kant, chief executive of government-run think-tank NITI Aayog, in a press conference today.' -- source: https://news.slashdot.org/story/20/05/26/1954212 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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New Android Vulnerability Strandhogg 2.0 Exploits User Trust
by Peter Reutemann 27 May '20

27 May '20

'A Norwegian infosec firm discovered a new Android vulnerability, which they've dubbed Strandhogg 2.0. Security firm Promon says "Strandhogg" is an old Norse strategy for coastline raids and abductions, and today's vulnerability is the "evil twin" of a similar one discovered in 2019. The original Strandhogg used an Android feature called taskAffinity to hijack applications -- by setting the taskAffinity of one of its activities to match the packageName of any other app, then setting allowTaskReparenting="true" in its own manifest, the Strandhogg app would be launched in place of the target app. Strandhogg's 1.0 major weakness was the need to declare taskAffinity in the Android Manifest. The Manifest is a plain XML file and must be included in the package hosted at the Play Store itself -- it can't simply be downloaded later, after the app is installed. This made it relatively simple to scan the Play store for apps with sketchy-looking taskAffinity declarations. Strandhogg 2.0 doesn't require any special settings in a package's Android Manifest -- meaning the attacking code doesn't need to be present on the Play Store to be scanned at all. Instead, the attacker can download the attack code later, once the trojan app or game is already installed on a user's device. In addition to the obvious credential-stealing attacks, Strandhogg can be used to trick users into escalating its privileges based on the trust they have for the apps it hijacks. For example, a user tapping Camera is asked if they want to grant it permission to access the camera and microphone -- if the user taps Yes, they've actually given those privileges to the malware app, not the Camera app it covered up on the screen. Strandhogg 2.0 affects all versions of Android prior to 10 -- which translates to roughly 90 percent of the Android userbase. Google rolled out a patch to close the Strandhogg 2.0 vulnerability, CVE-2020-0096, in May's Android Security Update. This is good news for Pixel users -- but as always, carriers and OEMs may delay those upgrades significantly.' -- source: https://it.slashdot.org/story/20/05/26/211241 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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Linus Torvalds Dumps Intel For 32-core AMD Ryzen On His Personal PC
by Peter Reutemann 26 May '20

26 May '20

'Linus Torvalds released Linux 5.7 rc7 today, saying it "looks very normal... none of the fixes look like there's anything particularly scary going on." But then he added something else: [T]he biggest excitement this week for me was just that I upgraded my main machine, and for the first time in about 15 years, my desktop isn't Intel-based. No, I didn't switch to ARM yet, but I'm now rocking an AMD Threadripper 3970x. My 'allmodconfig' test builds are now three times faster than they used to be, which doesn't matter so much right now during the calming down period, but I will most definitely notice the upgrade during the next merge window. The Register writes: Torvalds didn't divulge any further details about his new rig, but the 3970x is quite the beast, boasting 32 cores and 64 threads at 3.7GHz with the ability to burst up to 4.5GHz, all built on TSMC's 7nm FinFET process... Torvalds has probably acquired a whole new PC, as the Threadripper range requires a sTRX4 socket and those debuted on motherboards from late 2019. Whatever he's running, it has more cores than Intel currently offers in a CPU designed for PCs. Even Chipzilla's high-end CoreX range tops out at 18 cores. AMD will be over the moon that such a high profile IT pro has adopted their kit and pointed to its performance. Or, as long-time Slashdot reader williamyf puts it, "Good endorsement for AMD, a PR blow for Intel."' -- source: https://linux.slashdot.org/story/20/05/25/020240 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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Thousands of Enterprise Systems Infected by New Blue Mockingbird Malware Gang
by Peter Reutemann 26 May '20

26 May '20

'Thousands of enterprise systems are believed to have been infected with a cryptocurrency-mining malware operated by a group tracked under the codename of Blue Mockingbird. From a report: Discovered earlier this month by malware analysts from cloud security firm Red Canary, the Blue Mockingbird group is believed to have been active since December 2019. Researchers say Blue Mockingbird attacks public-facing servers running ASP.NET apps that use the Telerik framework for their user interface (UI) component. Hackers exploit the CVE-2019-18935 vulnerability to plant a web shell on the attacked server. They then use a version of the Juicy Potato technique to gain admin-level access and modify server settings to obtain (re)boot persistence. Once they gain full access to a system, they download and install a version of XMRRig, a popular cryptocurrency mining app for the Monero (XMR) cryptocurrency.' -- source: https://tech.slashdot.org/story/20/05/25/1913201 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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eBay Port Scans Visitors' Computers For Remote Access Programs
by Peter Reutemann 26 May '20

26 May '20

'When visiting the eBay.com site, a script will run that performs a local port scan of your computer to detect remote support and remote access applications. Many of these ports are related to remote access/remote support tools such as the Windows Remote Desktop, VNC, TeamViewer, Ammy Admin, and more. After learning about this, BleepingComputer conducted a test and can confirm that eBay.com is indeed performing a local port scan of 14 different ports when visiting the site.' -- source: https://it.slashdot.org/story/20/05/25/161246 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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