[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...

2021 Ubuntu Overlayfs LPE

This module exploits a vulnerability in Ubuntu's implementation of overlayfs. The vulnerability is the result of failing to verify the ability of a user to set the attributes in a running executable. Specifically, when Overlayfs sends the set attributes data to the underlying file system via...

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...

Updated kernel-linus packages fix security vulnerabilities

This kernel-linus update is based on upstream 5.10.75 and fixes at least the following security issues: A memory leak in the ccprunaesgcmcmd function in drivers/crypto/ ccp/ccp-ops.c in the Linux kernel allows malicious users to cause a denial of service memory consumption CVE-2021-3744. A memory...

Updated kernel packages fix security vulnerabilities

This kernel update is based on upstream 5.10.75 and fixes at least the following security issues: A memory leak in the ccprunaesgcmcmd function in drivers/crypto/ ccp/ccp-ops.c in the Linux kernel allows malicious users to cause a denial of service memory consumption CVE-2021-3744. A memory leak...

Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5116-2)

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5116-2 advisory. It was discovered that a race condition existed in the Atheros Ath9k WiFi driver in the Linux kernel. An attacker could possibly use this to...

Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5116-1)

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5116-1 advisory. It was discovered that a race condition existed in the Atheros Ath9k WiFi driver in the Linux kernel. An attacker could possibly use this to...

CVE-2021-20321

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system...