#ubuntu

Ubuntu Security Notice 5469-1 - 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 5470-1 - 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 5468-1 - 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 5467-1 - 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 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.

Ubuntu Security Notice 5464-1 - Nils Bars discovered that e2fsprogs incorrectly handled certain file systems. A local attacker could use this issue with a crafted file system image to possibly execute arbitrary code.

Ubuntu Security Notice 5463-1 - It was discovered that NTFS-3G incorrectly handled the ntfsck tool. If a user or automated system were tricked into using ntfsck on a specially crafted disk image, a remote attacker could possibly use this issue to execute arbitrary code. Roman Fiedler discovered that NTFS-3G incorrectly handled certain return codes. A local attacker could possibly use this issue to intercept protocol traffic between FUSE and the kernel.

Ubuntu Security Notice 5462-2 - USN-5462-1 fixed several vulnerabilities in Ruby. This update provides the corresponding CVE-2022-28739 update for ruby2.3 on Ubuntu 16.04 ESM. It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information.

Ubuntu Security Notice 5462-1 - It was discovered that Ruby incorrectly handled certain regular expressions. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 22.04 LTS. It was discovered that Ruby incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information.