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Linux Weekly News
LWN.net is a comprehensive source of news and opinions from and about the Linux community. This is the main LWN.net feed, listing all articles which are posted to the site front page.
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CentOS has updated kernel (C6: TCP injection).
Debian-LTS has updated libgcrypt11 (flawed random number generation).
Fedora has updated eog (F24: out-of-bounds write), kernel (F23: use-after-free), mariadb (F23: multiple vulnerabilities), mingw-lcms2 (F24: heap memory leak), postgresql (F23: multiple vulnerabilities), and python (F23: proxy injection).
Oracle has updated kernel (O6: TCP injection).
Scientific Linux has updated kernel (SL6: TCP injection).
Version 5.0.0 of the KDevelop integrated development environment (IDE) has been released, marking the end of a two-year development cycle. The highlight is a move to Clang for C and C++ support: "The most prominent change certainly is the move away from our own, custom C++ analysis engine. Instead, C and C++ code analysis is now performed by clang." The announcement goes on to describe other benefits of using Clang, such as more accurate diagnostics and suggested fixes for many syntax errors. KDevelop has also been ported to KDE Frameworks 5 and Qt 5, which opens up the possibility of Windows releases down the line.
Arch Linux has updated libgcrypt (information disclosure).
SUSE has updated MozillaFirefox (SLE12: multiple vulnerabilities).
Google has announced that the Android 7.0 release has started rolling out to recent-model Nexus devices. "It introduces a brand new JIT/AOT compiler to improve software performance, make app installs faster, and take up less storage. It also adds platform support for Vulkan, a low-overhead, cross-platform API for high-performance, 3D graphics. Multi-Window support lets users run two apps at the same time, and Direct Reply so users can reply directly to notifications without having to open the app. As always, Android is built with powerful layers of security and encryption to keep your private data private, so Nougat brings new features like File-based encryption, seamless updates, and Direct Boot." See this page for a video-heavy description of new features.
Greg Kroah-Hartman has announced the release of the 4.7.2, 4.4.19, and 3.14.77 stable kernels. As usual, they contain fixes throughout the tree and users of those series should upgrade.
Arch Linux has updated linux-lts (connection hijacking).
CentOS has updated kernel (C7: connection hijacking).
Fedora has updated firewalld (F24: authentication bypass), glibc (F24: denial of service on armhfp), knot (F24; F23: denial of service), libgcrypt (F24: bad random number generation), and perl (F23: privilege escalation).
openSUSE has updated apache2-mod_fcgid (42.1, 13.2: proxy injection), gd (13.2: multiple vulnerabilities), iperf (SPHfSLE12; 42.1, 13.2: denial of service), pdns (42.1, 13.2: denial of service), python3 (42.1, 13.2: multiple vulnerabilities), roundcubemail (42.1; 13.2; 13.1: multiple vulnerabilities, two from 2015), and typo3-cms-4_7 (42.1, 13.2: three vulnerabilities from 2013 and 2014).
The 4.8-rc3 kernel prepatch is out. "It all looks pretty sane, I'm not seeing anything hugely scary here."
The Fedora engineering steering committee has agreed that the upcoming Fedora 25 release should use the Wayland display manager by default. "There are still some bugs that are important to solve. However, there is still time to work on them. And the legacy Xorg session option will not be removed, and will be clearly documented how to fallback in cases where users need it." If this plan holds, it may be an important step in the long-awaited move away from the X Window system.
The kdenlive video editor project has announced the 16.08.0 release. "Kdenlive 16.08.0 marks a milestone in the project’s history bringing it a step closer to becoming a full-fledged professional tool." Highlights include three-point editing, pre-rendering of timeline effects, Krita image support, and more.
Red Hat has updated kernel (RHEL7; RHEL6: TCP injection), kernel-rt (RHEL7: TCP injection), python (RHEL 6,7: multiple vulnerabilities), python27-python (RHSC: multiple vulnerabilities), python33-python (RHSC: multiple vulnerabilities), realtime-kernel (RHEM2.5: TCP injection), rh-mariadb101-mariadb (RHSC: multiple vulnerabilities), rh-python34-python (RHSC: multiple vulnerabilities), and rh-python35-python (RHSC: multiple vulnerabilities).
Ubuntu has updated gnupg (12.04, 14.04, 16.04: flawed random-number generation), libgcrypt11, libgcrypt20 (12.04, 14.04, 16.06: flawed random-number generation), and postgresql-9.1, postgresql-9.3, postgresql-9.5 (12.04, 14.04, 16.04: multiple vulnerabilities).
Microsoft has announced the release of its PowerShell automation and scripting platform under the MIT license, complete with a GitHub repository. "Last year we started down this path by contributing to a number of open source projects (e.g. OpenSSH) and open sourcing a number of our own components including DSC resources. We learned that working closely with the community, in the code and with our backlog and issues list, allowed us prioritize and drive the development much more responsively. We’ve always worked with the community but shifting to a fine-grain, tight, feedback loop with the code, energized the team and allowed us to focus on the things that had the most impact for our customers and partners. Now we are going big by making PowerShell itself an open source project and making it available on Mac OS X, Ubuntu, CentOS/RedHat and others in the future."
The Xenomai project is mourning Gilles Chanteperdrix, a longtime maintainer of the realtime framework, who recently passed away. In the announcement, Philippe Gerum writes: "Gilles will forever be remembered as a true-hearted man, a brilliant mind always scratching beneath the surface, looking for elegance in the driest topics, never jaded from such accomplishment. According to Paul Valéry, “death is a trick played by the inconceivable on the conceivable”. Gilles’s absence is inconceivable to me, I can only assume that for once, he just got rest from tirelessly helping all of us."
Over at the Freedom to Tinker blog, Andrew Appel has a two-part series on security attacks and defenses for the upcoming elections in the US (though some of it will obviously be applicable elsewhere too). Part 1 looks at the voting and counting process with an eye toward ways to verify what the computers involved are reporting, but doing so without using the computers themselves (having and verifying the audit trail, essentially). Part 2 looks at the so-called cyberdefense teams and how their efforts are actually harming all of our security (voting and otherwise) by hoarding bugs rather than reporting them to get them fixed.
With optical-scan voting, the voter fills in the bubbles next to the names of her selected candidates on paper ballot; then she feeds the op-scan ballot into the optical-scan computer. The computer counts the vote, and the paper ballot is kept in a sealed ballot box. The computer could be hacked, in which case (when the polls close) the voting-machine lies about how many votes were cast for each candidate. But we can recount the physical pieces of paper marked by the voter’s own hands; that recount doesn’t rely on any computer. Instead of doing a full recount of every precinct in the state, we can spot-check just a few ballot boxes to make sure they 100% agree with the op-scan computers’ totals.
Problem: What if it’s not an optical-scan computer, what if it’s a paperless touchscreen (“DRE, Direct-Recording Electronic) voting computer? Then whatever numbers the voting computer says, at the close of the polls, are completely under the control of the computer program in there. If the computer is hacked, then the hacker gets to decide what numbers are reported. There are no paper ballots to audit or recount. All DRE (paperless touchscreen) voting computers are susceptible to this kind of hacking. This is our biggest problem.
Debian-LTS has updated libupnp (arbitrary file overwrite).
Ubuntu has updated fontconfig (16.04, 14.04, 12.04: privilege escalation).
The LWN.net Weekly Edition for August 18, 2016 is available.
Anyone who has been paying attention to Linux kernel development in recent years would be aware that IPC — interprocess communication — is not a solved problem. There are certainly many partial solutions, from pipes and signals, through sockets and shared memory, to more special-purpose solutions like Cross Memory Attach and Android's binder. But it seems there are still some use cases that aren't fully addressed by current solutions, leading to new solutions being occasionally proposed to try to meet those needs. The latest proposal is called "bus1".
Fedora has updated curl (F23: three vulnerabilities), drupal7-theme-zen (F24; F23: cross-site scripting), mingw-libarchive (F24: code execution), mingw-xz (F24: code execution), pulp (F24: two vulnerabilities), pulp-docker (F24: two vulnerabilities), pulp-ostree (F24: two vulnerabilities), pulp-puppet (F24: two vulnerabilities), pulp-python (F24: two vulnerabilities), and pulp-rpm (F24: two vulnerabilities).
Red Hat has updated kernel (RHEL6.2: privilege escalation).
SUSE has updated squid3 (SLE11-SP4: multiple vulnerabilities).
Ubuntu has updated openjdk-7 (14.04: multiple vulnerabilities).
Stable kernels 4.7.1, 4.6.7, 4.4.18, and 3.14.76 have been released. All contain important fixes. This is the last 4.6.y kernel, users should upgrade to 4.7.1 now.
Version 1.7 of the Go language has been released. "There is one tiny language change in this release. The section on terminating statements clarifies that to determine whether a statement list ends in a terminating statement, the 'final non-empty statement' is considered the end, matching the existing behavior of the gc and gccgo compiler toolchains." On the other hand, there appear to be significant optimization improvements; see the release notes for details.
Debian-LTS has updated extplorer (archive traversal).
SUSE has updated php5 (SLE11-SP2: multiple vulnerabilities).
Ubuntu has updated openssh (two vulnerabilities).
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