Security Patches and Bugs
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Security updates for Wednesday [LWN.net]
Security updates have been issued by CentOS (bind), Debian (adminer, grub2, spip, and wpa), Mageia (openjpeg2, wpa_supplicant, and xterm), openSUSE (avahi, bind, firefox, ImageMagick, java-1_8_0-openjdk, nodejs10, and webkit2gtk3), Red Hat (container-tools:1.0, container-tools:2.0, grub2, and virt:rhel and virt-devel:rhel), SUSE (bind, gnome-autoar, grub2, and nodejs8), and Ubuntu (python2.7 and wpa).
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Now-fixed Linux kernel vulnerabilities enabled local privilege escalation (CVE-2021-26708)
The vulnerabilities could be exploited for local privilege escalation, as confirmed in experiments on Fedora 33 Server. The vulnerabilities, known together as CVE-2021-26708, have received a CVSS v3 base score of 7.0 (high severity).
These vulnerabilities result from race conditions that were implicitly added with virtual socket multi-transport support. They appeared in Linux kernel version 5.5 in November 2019. The vulnerable kernel drivers (CONFIG_VSOCKETS and CONFIG_VIRTIO_VSOCKETS) are shipped as kernel modules in all major GNU/Linux distributions. The vulnerable modules are automatically loaded when an AF_VSOCK socket is created. This ability is available to unprivileged users.
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Researchers discover and patch Linux kernel vulnerabilities | 2021-03-03
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Privilege Manager
Privilege Manager 11: New privilege management capabilities for Unix and Linux