April 2024 - wlug - list.wlug.org.nz

Fedora Linux 40 Officially Released
by Peter Reutemann 24 Apr '24

24 Apr '24

'Fedora Linux 40 distribution has been officially released -- powered by the latest Linux 6.8 kernel series, and featuring the GNOME 46 and KDE Plasma 6 desktop environments, reports 9to5Linux: "Powered by the latest and greatest Linux 6.8 kernel series, the Fedora Linux 40 release ships with the GNOME 46 desktop environment for the flagship Fedora Workstation edition and the KDE Plasma 6 desktop environment for the Fedora KDE Spin, which defaults to the Wayland session as the X11 session was completely removed." "Fedora Linux 40 also includes some interesting package management changes, such as dropping Delta RPMs and disabling support in the default configuration of DNF / DNF5. It also changes the DNF behavior to no longer download filelists by default. However, this release doesn't ship with the long-awaited DNF5 package manager. For AMD GPUs, Fedora Linux 40 ships with AMD ROCm 6.0 as the latest release of AMD's software optimized for AI and HPC workload performance, which enables support for the newest flagship AMD Instinct MI300A and MI300X datacenter GPUs."' -- source: https://linux.slashdot.org/story/24/04/23/1452255 Cheers, Peter

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Ex WH Cyber Policy Director: Microsoft Is A Threat To US National Security
by Lawrence D'Oliveiro 23 Apr '24

23 Apr '24

Microsoft has become so dominant a supplier to the US Government that it cannot be effectively called to account on its repeated security lapses <https://www.theregister.com/2024/04/21/microsoft_national_security_risk/>. Even something as basic as event logging (which would have helped track exposure to things like the SolarWinds breach) was an extra-cost service that Microsoft customers had to pay for. Microsoft is squeezing a lot of profit out of those customers, and it feels no need to let up.

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Ubuntu 24.04 Yields a 20% Performance Advantage Over Windows 11 On Ryzen 7 Framework Laptop
by Peter Reutemann 19 Apr '24

19 Apr '24

'Michael Larabel reports via Phoronix: With the Framework 16 laptop one of the performance pieces I've been meaning to carry out has been seeing out Linux performs against Microsoft Windows 11 for this AMD Ryzen 7 7840HS powered modular/upgradeable laptop. Recently getting around to it in my benchmarking queue, I also compared the performance of Ubuntu 23.10 to the near final Ubuntu 24.04 LTS on this laptop up against a fully-updated Microsoft Windows 11 installation. The Framework 16 review unit as a reminder was configured with the 8-core / 16-thread AMD Ryzen 7 7840HS Zen 4 SoC with Radeon RX 7700S graphics, a 512GB SN810 NVMe SSD, MediaTek MT7922 WiFi, and a 2560 x 1600 display. In the few months of testing out the Framework 16 predominantly under Linux it's been working out very well. With also having a Windows 11 partition as shipped by Framework, after updating that install it made for an interesting comparison against the Ubuntu 23.10 and Ubuntu 24.04 performance. The same Framework 16 AMD laptop was used throughout all of the testing for looking at the out-of-the-box performance across Microsoft Windows 11, Ubuntu 23.10, and the near-final state of Ubuntu 24.04. [...] Out of 101 benchmarks carried out on all three operating systems with the Framework 16 laptop, Ubuntu 24.04 was the fastest in 67% of those tests, the prior Ubuntu 23.10 led in 22% (typically with slim margins to 24.04), and then Microsoft Windows 11 was the front-runner just 10% of the time... If taking the geomean of all 101 benchmark results, Ubuntu 23.10 was 16% faster than Microsoft Windows 11 while Ubuntu 24.04 enhanced the Ubuntu Linux performance by 3% to yield a 20% advantage over Windows 11 on this AMD Ryzen 7 7840HS laptop. Ubuntu 24.04 is looking very good in the performance department and will see its stable release next week. ' -- source: https://hardware.slashdot.org/story/24/04/18/2321230 Cheers, Peter

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FFmpeg 7.0 “Dijkstra”: Best New Features
by Peter Reutemann 19 Apr '24

19 Apr '24

'One of the major updates in FFmpeg 7.0 is the parallel execution of operations for unpacking/packing media containers, decoding, encoding, and applying filters using the ffmpeg command line utility. This feature allows for the simultaneous execution of multiple tasks, resulting in a significant improvement in performance and efficiency, particularly when working with large-scale multimedia projects. Another notable addition is the support for encoding and decoding video in MPEG-5 format (EVC – Essential Video Coding) using the external library libxevd. This new format provides high efficiency transmission and storage of all screen resolutions, supports video with an extended dynamic range (HDR), and panoramic video in 360-degree mode. In addition, FFmpeg 7.0 has added unpackers and packers of media containers (demuxer/muxer) for the QOA (Quite OK Audio) format, which is used for transmitting audio with loss of quality. QOA decoding is claimed to be three times faster than Ogg-Vorbis while achieving higher quality and compression levels compared to ADPCM. The new version also includes unpackers and packers of media containers (demuxer/muxer) for the IAMF (Immersive Audio Model and Format) format, which defines a container for distributing surround sound. The format provides for the transmission of additional information necessary for the operation of sound stage reconstruction and sound mixing algorithms, and takes into account the propagation of sound signals in three-dimensional space to recreate sound as close to natural as possible. An experimental decoder for the VVC (Versatile Video Coding) format, also known as the H.266 video compression standard, has been added in FFmpeg 7.0. This new format provides high efficiency transmission and storage of all screen resolutions, supports video with an extended dynamic range (HDR), and panoramic video in 360-degree mode. The ffplay utility has added support for hardware acceleration of decoding using the Vulkan and libplacebo APIs, and the ability to use API D3D12VA (Direct 3D 12 Video Encoding) for hardware acceleration of decoding of H264, HEVC, VP9, AV1, MPEG-2 and VC1 formats has been implemented. [...] Remember: This version is NOT backward compatible. That means, many CLI options and API are removed which are long deprecated. So use caution before upgrading to version 7.0.' -- source: https://www.debugpoint.com/ffmpeg-7-0-features/ Cheers, Peter -- My Open Source Blog - http://open.fracpete.org

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High Priority PuTTY Vulnerability Threatens Server Access Security
by Peter Reutemann 19 Apr '24

19 Apr '24

'A critical security vulnerability in PuTTY, a very popular software for secure terminal access to remote servers, has been discovered. This vulnerability could put the private keys of many users at risk. Cataloged as CVE-2024-31497, the vulnerability affects PuTTY version numbers between 0.68 and 0.80. So, if you have been using PuTTY during this time, it is important to be aware of what this means for your data security. Fabian Bäumer and Marcus Brinkmann of the Ruhr University Bochum found the vulnerability. It concerns how PuTTY forms signatures from the ECDSA private keys on the NIST P521 curve. The vulnerability with PuTTY is that it creates a component of the signature called ‘nonce’ during the generation process. This randomly generated number can be used once in a cryptographic communication, thus ensuring that old communications cannot be reused in replay attacks. However, PuTTY used a deterministic method to generate nonces due to the lack of a high-quality random number generator in early Windows systems. This deterministic method was biased for the P521 curve, which made the private key recovery possible. Simply put, an attacker who gets hold of multiple signed messages can potentially recover your private key due to a specific bias in the signature creation process. This would allow them to forge signatures and access any servers where you’ve used this key.' -- source: https://linuxiac.com/high-priority-putty-vulnerability-found/ Cheers, Peter -- My Open Source Blog - http://open.fracpete.org

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Packages With “t64” On The Ends Of Their Names
by Lawrence D'Oliveiro 15 Apr '24

15 Apr '24

Lately, in Debian Unstable, I have noticed package names starting to appear with “t64” on the ends. No doubt this will percolate through to Debian derivatives as well. I wondered what this was about, and found this forum thread <https://www.antixforum.com/forums/topic/t64-at-the-end-of-a-package-title/>. This has to do with the “year-2038” problem, which should only affect 32-bit systems anyway. But it seems some people are sufficiently concerned about this to ensure that their code will build with a 64-bit size for time_t (the POSIX type for holding the number of seconds since 1st January 1970), even on 32-bit systems. This is controlled at build time by setting the _TIME_BITS symbol to the value 64. There is a file /usr/include/features-time64.h (present if you have the libc6-dev package installed) that does the necessary setup of other time-related API calls based on this. On 64-bit systems (which is what most of us would be running by now), there would be absolutely no difference in the code with this setting. So the change in package name is I think only to maintain compatibility with 32-bit architectures.

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“Highly capable” hackers root corporate networks by exploiting firewall 0-day
by Peter Reutemann 15 Apr '24

15 Apr '24

'Highly capable hackers are rooting multiple corporate networks by exploiting a maximum-severity zero-day vulnerability in a firewall product from Palo Alto Networks, researchers said Friday. The vulnerability, which has been under active exploitation for at least two weeks now, allows the hackers with no authentication to execute malicious code with root privileges, the highest possible level of system access, researchers said. The extent of the compromise, along with the ease of exploitation, has earned the CVE-2024-3400 vulnerability the maximum severity rating of 10.0. The ongoing attacks are the latest in a rash of attacks aimed at firewalls, VPNs, and file-transfer appliances, which are popular targets because of their wealth of vulnerabilities and direct pipeline into the most sensitive parts of a network.' -- source: https://arstechnica.com/security/2024/04/highly-capable-hackers-root-corpor… Cheers, Peter

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APT Interface 'Revamped' For Ubuntu 24.10 and Debian Trixie with Colors and Columns
by Peter Reutemann 15 Apr '24

15 Apr '24

'Ubuntu 24.10 [expected this October] and Debian GNU/Linux 13 "Trixie" [expected June-July 2025] "will feature a refined APT command-line interface," reports 9to5Linux: APT developer and Canonical engineer Julian Andres Klode took to LinkedIn to present the revamped APT interface powered by the upcoming APT 3.0 package manager that looks to give users a more concise and well-laid-out command-line output when updating, installing, or removing packages via the terminal emulator. The new APT 3.0 UI brings a columnar display that will make it easier for users to quickly scan for a package name, support for colors (red for removals and green for other changes), which makes it easier to quickly distinguish commands at a glance, and smoother install progress bars using Unicode blocks. In addition, the new APT 3.0 command-line interface will be less verbose and offer more padding to make it easier to separate sections and extract the relevant information for you. "Bleeding-edge users and Linux enthusiasts who want to try this right now can check out Debian Unstable..."' -- source: https://linux.slashdot.org/story/24/04/14/052258 Cheers, Peter

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Canonical Says Qualcomm Has Joined Ubuntu's 'Silicon Partner' Program
by Peter Reutemann 15 Apr '24

15 Apr '24

'Intel, Nvidia, AMD, and Arm are among Canonical's "silicon partners," a program that "ensures maximum Ubuntu compatibility and long-term support with certified hardware," according to Web Pro News. And now Qualcomm is set to be Canonical's next silicon partner, "giving Qualcomm access to optimized versions of Ubuntu for its processors." Companies looking to use Ubuntu on Qualcomm chips will benefit from an OS that provides 10 years of support and security updates. The collaboration is expected to be a boon for AI, edge computing, and IoT applications. "The combination of Qualcomm Technologies' processors with the popularity of Ubuntu among AI and IoT developers is a game changer for the industry," commented Dev Singh, Vice President, Business Development and Head of Building, Enterprise & Industrial Automation, Qualcomm Technologies, Inc... "Optimised Ubuntu and Ubuntu Core images will be available for Qualcomm SoCs," according to the announcement, "enabling enterprises to meet their regulatory, compliance and security demands for AI at the edge and the broader IoT market with a secure operating system that is supported for 10 years." Qualcomm Technologies chose to partner with Canonical to create an optimised Ubuntu for Qualcomm IoT chipsets, giving developers an easy path to create safe, compliant, security-focused, and high-performing applications for multiple industries including industrial, robotics and edge automation... Developers and enterprises can benefit from the Ubuntu Certified Hardware program, which features a growing list of certified ODM boards and devices based on Qualcomm SoCs. These certified devices deliver an optimised Ubuntu experience out-of-the-box, enabling developers to focus on developing applications and bringing products to market.' -- source: https://news.slashdot.org/story/24/04/14/1652246 Cheers, Peter

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New Spectre V2 Attack Impacts Linux Systems On Intel CPUs
by Peter Reutemann 14 Apr '24

14 Apr '24

'BleepingComputer reports: Researchers have demonstrated the "first native Spectre v2 exploit" for a new speculative execution side-channel flaw that impacts Linux systems running on many modern Intel processors. Spectre V2 is a new variant of the original Spectre attack discovered by a team of researchers at the VUSec group from VU Amsterdam. The researchers also released a tool that uses symbolic execution to identify exploitable code segments within the Linux kernel to help with mitigation. The new finding underscores the challenges in balancing performance optimization with security, which makes addressing fundamental CPU flaws complicated even six years after the discovery of the original Spectre.... As the CERT Coordination Center (CERT/CC) disclosed yesterday, the new flaw, tracked as CVE-2024-2201, allows unauthenticated attackers to read arbitrary memory data by leveraging speculative execution, bypassing present security mechanisms designed to isolate privilege levels. "An unauthenticated attacker can exploit this vulnerability to leak privileged memory from the CPU by speculatively jumping to a chosen gadget," reads the CERT/CC announcement. "Current research shows that existing mitigation techniques of disabling privileged eBPF and enabling (Fine)IBT are insufficient in stopping BHI exploitation against the kernel/hypervisor." ' -- source: https://linux.slashdot.org/story/24/04/13/1911230 Cheers, Peter

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