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Security Leftovers

Submitted by Roy Schestowitz on Friday 18th of February 2022 10:02:39 PM Filed under
Security
  • Security updates for Friday [LWN.net]

    Security updates have been issued by Debian (chromium and zsh), Fedora (microcode_ctl and zziplib), Mageia (docker-containerd, mariadb, nas, phoronix-test-suite, rlwrap, thunderbird, webkit2, wireshark, zsh, and zxing-cpp), openSUSE (aide, chromium, clamav, expat, htmldoc, libmspack, libsndfile, python-Twisted, qemu, rust, strongswan, tiff, virglrenderer, and xerces-j2), Slackware (mozilla and php), SUSE (aide, clamav, cobbler, expat, kernel, libmspack, libsndfile, python-numpy, python-Twisted, qemu, rust, strongswan, tcpdump, tiff, ucode-intel, virglrenderer, wpa_supplicant, and xerces-j2), and Ubuntu (kernel, libarchive, linux-hwe-5.13, and snapd).

  • This Week in Security: Chrome 0-day,Cassandra, and a Cisco PoC

    Running Chrome or a Bhromium-based browser? Check for version 98.0.4758.102, and update if you’re not running that release or better. Quick tip, use chrome://restart to trigger an immediate restart of Chrome, just like the one that comes after an update. This is super useful especially after installing an update on Linux, using apt, dnf, or the like.

    CVE-2022-0609 is the big vulnerability just patched, and Google has acknowledged that it’s being exploited in the wild. It’s a use-after-free bug, meaning that the application marks a section of memory as returned to the OS, but then accesses that now-invalid memory address. The time gap between freeing and erroneously re-using the memory allows malicious code to claim that memory as its own, and write something unexpected.

    Google has learned their lesson about making too many details public too early, and this CVE and associated bug aren’t easily found in in the Chromium project’s source, and there doesn’t seem to be an exploit published in the Chromium code testing suite.

  • Launchpad now supports SSH Ed25519 keys and RSA SHA-2 signatures | Colin Watson's blog

    As of 2022-02-16, Launchpad supports a couple of features on its SSH endpoints (git.launchpad.net, bazaar.launchpad.net, ppa.launchpad.net, and upload.ubuntu.com) that it previously didn’t: Ed25519 public keys (a well-regarded format, supported by OpenSSH since 6.5 in 2014) and signatures with existing RSA public keys using SHA-2 rather than SHA-1 (supported by OpenSSH since 7.2 in 2016).

    I’m hesitant to call these features “new”, since they’ve been around for a long time elsewhere, and people might quite reasonably ask why it’s taken us so long. The problem has always been that Launchpad can’t really use a normal SSH server such as OpenSSH because it needs features that aren’t practical to implement that way, such as virtual filesystems and dynamic user key authorization against the Launchpad database. Instead, we use Twisted Conch, which is a very extensible Python SSH implementation that has generally served us well. The downside is that, because it’s an independent implementation and one that occupies a relatively small niche, it often lags behind in terms of newer protocol features.

  • CISA Compiles Free Cybersecurity Services and Tools for Network Defenders | CISA

    CISA has compiled and published a list of free cybersecurity services and tools to help organizations reduce cybersecurity risk and strengthen resiliency. This non-exhaustive living repository includes services provided by CISA, widely used open source tools, and free tools and services offered by private and public sector organizations across the cybersecurity community. Before turning to the free offerings, CISA strongly recommends organizations take certain foundational measures to implement a strong cybersecurity program:

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