The version of kernel installed on the remote host is prior to 5.4.68-34.125. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-016 advisory.

    A flaw was found in the Linux kernel's implementation of BTRFS free space management, where the kernel     does not correctly manage the lifetime of internal data structures used. An attacker could use this flaw     to corrupt memory or escalate privileges. (CVE-2019-19448)

    A use-after-free flaw was found in the debugfs_remove function in the Linux kernel. The flaw could allow a     local attacker with special user (or root) privilege to crash the system at the time of file or directory     removal. This vulnerability can lead to a kernel information leak. The highest threat from this     vulnerability is to system availability. (CVE-2019-19770)

    A flaw was found in the Linux kernel, where it allows userspace processes, for example, a guest VM, to     directly access h/w devices via its VFIO driver modules. The VFIO modules allow users to enable or disable     access to the devices' MMIO memory address spaces. If a user attempts to access the read/write devices'     MMIO address space when it is disabled, some h/w devices issue an interrupt to the CPU to indicate a fatal     error condition, crashing the system. This flaw allows a guest user or process to crash the host system     resulting in a denial of service. (CVE-2020-12888)

    A memory out-of-bounds read flaw was found in the Linux kernel's ext3/ext4 file system, in the way it     accesses a directory with broken indexing. This flaw allows a local user to crash the system if the     directory exists. The highest threat from this vulnerability is to system availability. (CVE-2020-14314)

    A flaw was found in the Linux kernel. A failure of the file system metadata validator in XFS can cause an     inode with a valid, user-creatable extended attribute to be flagged as corrupt.  This can lead to the     filesystem being shutdown, or otherwise rendered inaccessible until it is remounted, leading to a denial     of service. The highest threat from this vulnerability is to system availability. (CVE-2020-14385)

    A flaw was found in the Linux kernel. When changing screen size, an out-of-bounds memory write can occur     leading to memory corruption or a denial of service. Due to the nature of the flaw, privilege escalation     cannot be fully ruled out. (CVE-2020-14390)

    A flaw was found in the NFSv4 implementation where when mounting a remote attacker controlled server it     could return specially crafted response allow for local memory corruption and possibly privilege     escalation. (CVE-2020-25212)

    A flaw was found in the capabilities check of the rados block device functionality in the Linux kernel.
    Incorrect capability checks could alllow a local user with root priviledges (but no capabilities) to add     or remove Rados Block Devices from the system. (CVE-2020-25284)

    A flaw was found in the Linux kernels sysctl handling code for hugepages management. When multiple root     level processes would write to modify the /proc/sys/vm/nr_hugepages file it could create a race on     internal variables leading to a system crash or memory corruption. (CVE-2020-25285)

    A flaw was found in the Linux kernel's implementation of biovecs. A zero-length biovec request issued by     the block subsystem could cause the kernel to enter an infinite loop, causing a denial of service. This     flaw allows a local attacker with basic privileges to issue requests to a block device, resulting in a     denial of service. The highest threat from this vulnerability is to system availability. (CVE-2020-25641)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-016)

high Nessus Plugin ID 160437

Version 1.6

Version 1.5

Version 1.6 Dec 12, 2024, 9:55 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202412120955
Version 1.5 Sep 5, 2023, 10:10 PM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:POC/RL:OF/RC:C". "CVSSv3 temporal vector" set to "CVSS:3.0/E:P/RL:O/RC:C") Detection Exploit attributes ("Exploit available" set to "True". "Exploitability ease" changed from "No known exploits are available" to "Exploits are available") Plugin requirements Plugin Feed: 202309052210