March 2023 - wlug - list.wlug.org.nz

New Attack On AI Bots: Prompt Injection
by Lawrence D'Oliveiro 01 Jul '26

01 Jul '26

A Twitter bot account run by a company that posts remote job listings was programmed to respond to tweets directed to it with general inoffensive comments touting the positive aspects of remote work. However <https://arstechnica.com/information-technology/2022/09/twitter-pranksters-d…>, some other Twitter users discovered that if they began their tweet with directives to “ignore previous instructions”, they could get the bot to say just about anything. And much hilarity ensued. Basically, the way the bot program works is it begins with some standard instructions on what to say, provided by the people who set up the account, to which is appended whatever tweet content was sent to the bot by the other user. This is then processed by the AI system to produce a response. This attack has been dubbed “prompt injection”, by analogy with “SQL injection” and other similar attacks on non-AI systems. But whereas those attacks can be blocked using basic, well-known syntactic quoting techniques, there seem to be no easy equivalents for stopping an AI paying attention to instructions it should not be obeying.

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Weta Digital’s Technology Division Sold To US Firm
by Lawrence D'Oliveiro 01 Aug '25

01 Aug '25

Let me see if I understand this article <https://www.nzherald.co.nz/business/sir-peter-jackson-to-sell-weta-digital-…> correctly: the part of Weta Digital that used to develop the in-house 3D graphics/effects tools that they use in all those movies is being sold to US-based Unity Software. The part that is left will be called “WetaFX”, and will become a customer of Unity for the use of those tools, no longer doing its own development in-house. By the way, I’ve been looking at the Unity site <https://unity.com/>, and it looks like all their products are rentware (subscription-based).

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List Of IPTV Resources
by Lawrence D'Oliveiro 22 Sep '24

22 Sep '24

This user <https://github.com/iptv-org> just popped up in my GitHub feed. One repo <https://github.com/iptv-org/iptv> claims to be a list of links to over 8000 streaming TV channels from nations all over the world, while the other is a list of tools*, providers and other resources. Do be aware it’s a bit of a mixed bag: yes, there are legitimate channels (no encryption so far that I have noticed), but also some dubious-looking links. *Oddly, FFmpeg and youtube-dl aren’t in the list.

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Enabling Case-Insensitive Filenames On Linux
by Lawrence D'Oliveiro 06 Feb '24

06 Feb '24

The ext4 filesystem has had the “casefold” option for a while now <https://lwn.net/Articles/784041/>. This allows you to specify, when you initialize a new filesystem, that you want file/directory names to be treated as case-insensitive. At the same time, you have to specify that the filenames are to be interpreted as UTF-8 encoding; normally the kernel doesn’t care, it only singles out ASCII slash and NUL bytes for special interpretation, and simply passes through any other byte values in the names. I was able to create such a filesystem, but I wasn’t able to mount it in my last-upgraded-just-a-few-days-ago Debian Unstable setup. When I try, it fails, and in the dmesg log I see Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE Turns out the Debian 5.10 kernel has not been built with this CONFIG_UNICODE option enabled. However, this situation looks set to change shortly, according to <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985689>.

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Unkillable UEFI Malware Bypassing Secure Boot Enabled By Unpatchable Windows Flaw
by Peter Reutemann 12 May '23

12 May '23

'Researchers have announced a major cybersecurity find -- the world's first-known instance of real-world malware that can hijack a computer's boot process even when Secure Boot and other advanced protections are enabled and running on fully updated versions of Windows. From a report: Dubbed BlackLotus, the malware is what's known as a UEFI bootkit. These sophisticated pieces of malware hijack the UEFI -- short for Unified Extensible Firmware Interface -- the low-level and complex chain of firmware responsible for booting up virtually every modern computer. As the mechanism that bridges a PC's device firmware with its operating system, the UEFI is an OS in its own right. It's located in an SPI-connected flash storage chip soldered onto the computer motherboard, making it difficult to inspect or patch. Because the UEFI is the first thing to run when a computer is turned on, it influences the OS, security apps, and all other software that follows. These traits make the UEFI the perfect place to run malware. When successful, UEFI bootkits disable OS security mechanisms and ensure that a computer remains infected with stealthy malware that runs at the kernel mode or user mode, even after the operating system is reinstalled or a hard drive is replaced. As appealing as it is to threat actors to install nearly invisible and unremovable malware that has kernel-level access, there are a few formidable hurdles standing in their way. One is the requirement that they first hack the device and gain administrator system rights, either by exploiting one or more vulnerabilities in the OS or apps or by tricking a user into installing trojanized software. Only after this high bar is cleared can the threat actor attempt an installation of the bootkit. The second thing standing in the way of UEFI attacks is UEFI Secure Boot, an industry-wide standard that uses cryptographic signatures to ensure that each piece of software used during startup is trusted by a computer's manufacturer. Secure Boot is designed to create a chain of trust that will prevent attackers from replacing the intended bootup firmware with malicious firmware. If a single firmware link in that chain isn't recognized, Secure Boot will prevent the device from starting.' -- source: https://it.slashdot.org/story/23/03/06/1854200 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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'One In Two New Npm Packages Is SEO Spam Right Now'
by Peter Reutemann 31 Mar '23

31 Mar '23

'Gabi Dobocan, writing at auditing firm Sandworm: More than half of all new packages that are currently (29 Mar 2023) being submitted to npm are SEO spam. That is - empty packages, with just a single README file that contains links to various malicious websites. Out of the ~320k new npm packages or versions that Sandworm has scanned over the past week, at least ~185k were labeled as SEO spam. Just in the last hour as of writing this article, 1583 new e-book spam packages have been published. All the identified spam packages are currently live on npmjs.com.' -- source: https://developers.slashdot.org/story/23/03/30/184239 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Numen voice control
by Peter Reutemann 30 Mar '23

30 Mar '23

Saw the following on my Mastodon feed: Numen is an open GPL licensed project by @geb that allows system-wide computing by VoiceControl without using mouse or keyboard. A great a11y (= accessibility) tool, looks like. https://numenvoice.com https://git.sr.ht/~geb/numen -- soure: https://social.coop/@smallcircles/110106575204873016 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Ubuntu Cinnamon Remix Becomes Official Ubuntu Flavor
by Peter Reutemann 29 Mar '23

29 Mar '23

'A report from 9to5Linux: The Ubuntu Cinnamon Remix distribution has become an official Ubuntu flavor and will join the rest of the flavors starting with the upcoming Ubuntu 23.04 (Lunar Lobster) release. Created and maintained by members of the Linux community, Ubuntu Cinnamon Remix is an Ubuntu derivative that features the modern Cinnamon desktop environment developed by the Linux Mint team. Cinnamon Remix aims to offer a traditional approach to the modern Linux desktop. Until now, the maintainers of Ubuntu Cinnamon Remix did a very good job keeping up with all upstream Ubuntu releases, even offering a custom version of the official wallpaper of each new Ubuntu release to match the Cinnamon desktop environment's style. Ubuntu Cinnamon will not be the only new official Ubuntu flavor this Spring when Ubuntu 23.04 will be released as the maintainers of Ubuntu Unity have also managed to obtain official Ubuntu flavor status last year in September. As with Ubuntu Unity, the next step now for the Ubuntu Cinnamon maintainers is to bake daily ISO images in preparation for the upcoming Lunar Lobster release and maybe even take part in the Ubuntu 23.04 beta release later this week on March 30th. ' -- source: https://news.slashdot.org/story/23/03/28/2134218 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Arduino Announces 'UNO R4' with Clock Speed/Memory/Storage Upgrades, 32-bit ARM Cortex-M4
by Peter Reutemann 28 Mar '23

28 Mar '23

'Saturday Arduino announced "a new, revolutionary revision of the iconic UNO board," promising "a long-awaited update on performance and possibilities." The Arduino UNO R4 indeed preserves the well-known features of the UNO family — standard form factor, shield compatibility, 5V operating voltage, outstanding robustness — while offering no less than a 32-bit Cortex-M4 and a 3-to-16x increase in clock speed, memory and flash storage.... The UNO R4 will come in two versions — UNO R4 WiFi and UNO R4 Minima — offering unprecedented performance and possibilities for the maker community. The WiFi version comes with an Espressif S3 WiFi module, expanding creative opportunities for makers, educators, and hobbyists alike; while the UNO R4 Minima provides a cost-effective option for those seeking the new microcontroller without additional features.... SRAM went from 2kB to 32kB, and flash memory went from 32kB to 256kB to accommodate more complex projects. In addition, following the requests from the community, the USB port was upgraded to the USB-C and maximum power supply voltage was increased to 24V with an improved thermal design. The board provides a CAN bus, which allows users to minimize wiring and execute different tasks in parallel by connecting multiple shields. Finally, the new board includes a 12-bit analog DAC. All in all, Arduino UNO R4 is the answer to the requests for improvement and updates the developer and maker community has been advancing, making it easier than ever to get started with Arduino.... On the software side, a big effort is being made to maximize retrocompatibility of the most popular Arduino libraries so that users will be able to rely on existing code examples and tutorials.' -- source: https://hardware.slashdot.org/story/23/03/26/2357240 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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Pinduoduo App Malware Detailed By Cybersecurity Researchers
by Peter Reutemann 28 Mar '23

28 Mar '23

'Security researchers at Moscow-based Kaspersky Lab have identified and outlined potential malware in versions of PDD Holdings' Chinese shopping app Pinduoduo, days after Google suspended it from its Android app store. From a report: In one of the first public accountings of the malicious code, Kaspersky laid out how the app could elevate its own privileges to undermine user privacy and data security. It tested versions of the app distributed through a local app store in China, where Huawei Technologies, Tencent Holdings and Xiaomi run some of the biggest app markets. Kaspersky's findings, shared with Bloomberg News, were among the clearest explanations from an independent security team for what triggered Google's action and malware warning last week. The cybersecurity firm, which has played a role in uncovering some of the biggest cyberattacks in history, said it found evidence that earlier versions of Pinduoduo exploited system software vulnerabilities to install backdoors and gain unauthorized access to user data and notifications. Those conclusions agreed in large part with those of researchers that had posted their discoveries online in past weeks, though Bloomberg News hasn't verified the authenticity of the earlier reports.' -- source: https://it.slashdot.org/story/23/03/27/1420241 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, Hamilton, NZ Mobile +64 22 190 2375 https://www.cs.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

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