The version of kernel installed on the remote host is prior to 5.4.91-41.139. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-019 advisory.

    A flaw was found in the JFS filesystem code. This flaw allows a local attacker with the ability to set     extended attributes to panic the system, causing memory corruption or escalating privileges. The highest     threat from this vulnerability is to confidentiality, integrity, as well as system availability.
    (CVE-2020-27815)

    A flaw was found in the Linux kernel's implementation of the Linux SCSI target host, where an     authenticated attacker could write to any block on the exported SCSI device backing store. This flaw     allows an authenticated attacker to send LIO block requests to the Linux system to overwrite data on the     backing store. The highest threat from this vulnerability is to integrity. In addition, this flaw affects     the tcmu-runner package, where the affected SCSI command is called. (CVE-2020-28374)

    An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are     processing watch events using a single thread. If the events are received faster than the thread is able     to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the     backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable. (CVE-2020-29568)

    An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux     kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped.
    However, the handler may not have time to run if the frontend quickly toggles between the states connect     and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving     guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege     escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
    (CVE-2020-29569)

    A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel. A local user could     use this flaw to read numerical value from memory after free. (CVE-2020-29660)

    A locking vulnerability was found in the tty subsystem of the Linux kernel in drivers/tty/tty_jobctrl.c.
    This flaw allows a local attacker to possibly corrupt memory or escalate privileges. The highest threat     from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2020-29661)

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-5.4-2022-019)

high Nessus Plugin ID 160430

Version 1.9

Version 1.8

Version 1.7

Version 1.9 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 1.8 Sep 5, 2023, 10:10 PM Detection Plugin metadata Plugin requirements Plugin Feed: 202309052210
Version 1.7 Dec 7, 2022, 1:48 PM CVE (set "CVE" coverage to "CVE-2021-39648") Plugin metadata Plugin Feed: 202212071348