Ubuntu 6339-3: Linux kernel vulnerabilities
Summary
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems - linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems Details: It was discovered that the NTFS file system implementation in the Linux kernel did not properly validate MFT flags in certain situations. An attacker could use this to construct a malicious NTFS image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2022-48425) Zi Fan Tan discovered that the binder IPC implementation in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-21255) It was discovered that a race condition existed in the f2fs file system in the Linux kernel, leading to a null pointer dereference vulnerability. An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-2898) It was discovered that the DVB Core driver in the Linux kernel did not properly handle locking events in certain situations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2023-31084) Yang Lan discovered that the GFS2 file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious GFS2 image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-3212) It was discovered that the KSMBD implementation in the Linux kernel did not properly validate buffer sizes in certain operations, leading to an out-of- bounds read vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-38426, CVE-2023-38428) It was discovered that the KSMBD implementation in the Linux kernel did not properly calculate the size of certain buffers. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-38429)
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1037-raspi 5.15.0-1037.40 linux-image-5.15.0-1046-azure 5.15.0-1046.53 linux-image-5.15.0-1046-azure-fde 5.15.0-1046.53.1 linux-image-azure-fde-lts-22.04 5.15.0.1046.53.24 linux-image-azure-lts-22.04 5.15.0.1046.42 linux-image-raspi 5.15.0.1037.35 linux-image-raspi-nolpae 5.15.0.1037.35 Ubuntu 20.04 LTS: linux-image-5.15.0-1046-azure 5.15.0-1046.53~20.04.1 linux-image-5.15.0-1046-azure-fde 5.15.0-1046.53~20.04.1.1 linux-image-azure 5.15.0.1046.53~20.04.35 linux-image-azure-cvm 5.15.0.1046.53~20.04.35 linux-image-azure-fde 5.15.0.1046.53~20.04.1.24 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.
References
https://ubuntu.com/security/notices/USN-6339-3
https://ubuntu.com/security/notices/USN-6339-1
CVE-2022-48425, CVE-2023-21255, CVE-2023-2898, CVE-2023-31084,
CVE-2023-3212, CVE-2023-38426, CVE-2023-38428, CVE-2023-38429
![Dist Ubuntu](/images/distros/dist-ubuntu.png)
Package Information
https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1046.53 https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1046.53.1 https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1037.40 https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1046.53~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1046.53~20.04.1.1