RLSA-2021:5241 Moderate: kernel-rt security and bug fix update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fixes: kernel: In Overlayfs missing a check for a negative dentry before calling vfsrename CVE-2021-20321 For more details about the security...

ALSA-2021:5227 Moderate: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: In Overlayfs missing a check for a negative dentry before calling vfsrename CVE-2021-20321 For more details about the security issues, including the impact, a CVSS score, acknowledgments,...

RLSA-2021:5227 Moderate: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: In Overlayfs missing a check for a negative dentry before calling vfsrename CVE-2021-20321 For more details about the security issues, including the impact, a CVSS score, acknowledgments,...

kernel security and bug fix update

An update is available for kernel. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The kernel packages contain the Linux kernel, the core of any Linux operating...

Linux kernel competition condition issue vulnerability (CNVD-2022-21490)

Linux kernel is the kernel used by the Linux Foundation's open source operating system Linux. kernel is one of the kernel-based virtual machines. overlayfs is one of the file systems. a security vulnerability exists in Linux kernel, which stems from a contention condition issue in the overlayfs...

Linux kernel 竞争条件问题漏洞

Linux kernel is the kernel used by the Linux Foundation's open source operating system Linux. kernel is one of the kernel-based virtual machines. overlayfs is one of the file systems. a security vulnerability exists in Linux kernel, which stems from a contention condition issue in the overlayfs...

[SECURITY] [DLA 2843-1] linux security update

Debian LTS Advisory DLA-2843-1 [email protected] https://www.debian.org/lts/security/ Ben Hutchings December 16, 2021 https://wiki.debian.org/LTS Package : linux Version : 4.9.290-1 CVE ID : CVE-2020-3702 CVE-2020-16119 CVE-2021-0920 CVE-2021-3612 CVE-2021-3653 CVE-2021-3655 CVE-2021-36...

Exploit for Privilege Context Switching Error in Canonical Ubuntu_Linux

PoC exploit for CVE-2021-3493, a local privilege escalation vulnerability in Ubuntu OverlayFS. The target is the Linux kernel, specifically the overlayfs file system, which did not properly validate the application of file system capabilities with respect to user namespaces. A local attacker coul...

OracleVM 3.4 : kernel-uek (OVMSA-2021-0039)

The remote OracleVM system is missing necessary patches to address security updates: - A security issue was found in Linux kernel's OverlayFS subsystem where a local attacker who has the ability to mount the TmpFS filesystem with OverlayFS can abuse a logic bug in the overlayfs code which can...

Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9577)

The remote Oracle Linux 6 / 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-9577 advisory. - ovl: prevent private clone if bind mount is not allowed Miklos Szeredi Orabug: 33560431 CVE-2021-3732 Tenable has extracted the preceding description bloc...

Metasploit Wrap-Up

Metasploit CTF 2021 starts today It’s that time of year again! Time for the 2021 Metasploit Community CTF. Earlier today over 1,100 users in more than 530 teams were registered and opened for participation to solve this year’s 18 challenges. Next week a recap and the winners will be announced, so...

Exploit for Privilege Context Switching Error in Canonical Ubuntu_Linux

This is a PoC exploit for CVE-2021-3493, a local privilege escalation vulnerability in Ubuntu OverlayFS. The exploit targets Ubuntu versions 20.10, 20.04 LTS, 19.04, 18.04 LTS, 16.04 LTS, and 14.04 ESM. The vulnerability arises from a Linux kernel issue where it did not properly validate the...

USN-5141-1 firejail vulnerability

Roman Fiedler discovered that a race condition existed in Firejail when using OverlayFS to prevent writes to the underlying file system. A local attacker could use this to gain administrative privileges. Note: this update disables support for OverlayFS in Firejail...

USN-5141-1: Firejail vulnerability

Roman Fiedler discovered that a race condition existed in Firejail when using OverlayFS to prevent writes to the underlying file system. A local attacker could use this to gain administrative privileges. Note: this update disables support for OverlayFS in Firejail...

RHEL 8 : kernel-rt (RHSA-2021:4140)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4140 advisory. The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirement...

kernel: overlayfs: Mounting overlayfs inside an unprivileged user namespace can reveal files

A flaw was found in the Linux kernel’s OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible...

kernel: overlayfs: Mounting overlayfs inside an unprivileged user namespace can reveal files

A flaw was found in the Linux kernel’s OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible...

container-tools:2.0 security update

An update is available for fuse-overlayfs, container-selinux, udica, runc, toolbox, podman, conmon, skopeo, python-podman-api, slirp4netns, containernetworking-plugins, buildah, criu, cockpit-podman. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which...

container-tools:rhel8 security, bug fix, and enhancement update

An update is available for fuse-overlayfs, container-selinux, udica, containers-common, runc, toolbox, podman, conmon, skopeo, crun, libslirp, oci-seccomp-bpf-hook, python-podman, slirp4netns, containernetworking-plugins, buildah, criu, cockpit-podman. This update affects Rocky Linux 8. A Common...

PT-2021-7682 · Linux +5 · Linux Kernel +5

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A use-after-free flaw was found in the Linux kernel’s Ext4 File System related to the overlay FS usage. This issue allows a local user to crash or potentially escalate their privileges...