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Ubuntu Security Notice 5466-1 - It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the removal of stateful expressions in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or execute arbitrary code.

Ubuntu Security Notice 5465-1 - It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the removal of stateful expressions in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or execute arbitrary code.

In this post, we’ll give you an overview of five Linux malware families your SMB should be protecting itself against — and how they work. The post 5 Linux malware families SMBs should protect themselves against appeared first on Malwarebytes Labs.

Cybersecurity researchers have disclosed two unpatched security vulnerabilities in the open-source U-Boot boot loader. The issues, which were uncovered in the IP defragmentation algorithm implemented in U-Boot by NCC Group, could be abused to achieve arbitrary out-of-bounds write and denial-of-service (DoS). U-Boot is a boot loader used in Linux-based embedded systems such as ChromeOS as well as

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It was discovered that a race condition existed in the network scheduling subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the Linux kernel did not properly restrict access to the cgroups v1 release_agent feature. A local attacker could use this to gain administrative privileges. Various other issues were also addressed.

Microsoft Philanthropies is expanding its cybersecurity skills for jobs campaign to 23 countries and partnering with Women in CyberSecurity (WiCyS) to build a cybersecurity workforce that is not just larger but also more diverse.

Red Hat Security Advisory 2022-4880-01 - Updated images are now available for Red Hat Advanced Cluster Security for Kubernetes (RHACS). The updated image includes bug fixes and feature improvements. Issues addressed include a bypass vulnerability.

Updated images are now available for Red Hat Advanced Cluster Security for Kubernetes (RHACS). The updated image includes bug fixes and feature improvements. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2021-23820: json-pointer: type confusion vulnerability can lead to a bypass of CVE-2020-7709 when the pointer components are arrays * CVE-2021-41190: opencontainers: OCI manifest and index parsing confusion

The cloud instances were left open to the public Internet with no authentication, allowing attackers to wipe the data.