The version of kernel installed on the remote host is prior to 5.4.253-167.359. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2023-054 advisory.

    2024-07-03: CVE-2023-39197 was added to this advisory.

    2024-07-03: CVE-2023-1611 was added to this advisory.

    2024-07-03: CVE-2023-51043 was added to this advisory.

    2024-02-01: CVE-2024-0639 was added to this advisory.

    2023-10-12: CVE-2023-4128 was added to this advisory.

    2023-10-12: CVE-2023-3212 was added to this advisory.

    2023-10-12: CVE-2023-34319 was added to this advisory.

    2023-10-12: CVE-2023-4194 was added to this advisory.

    A use-after-free flaw was found in btrfs_search_slot in fs/btrfs/ctree.c in btrfs in the Linux Kernel.This     flaw allows an attacker to crash the system and possibly cause a kernel information lea (CVE-2023-1611)

    A flaw in the Linux Kernel found in the GFS2 file system. On corrupted gfs2 file systems the evict code     can try to reference the journal descriptor structure, jdesc, after it has been freed and set to NULL. It     can lead to null pointer dereference when gfs2_trans_begin being called and then fail     ingfs2_evict_inode(). (CVE-2023-3212)

    The fix for XSA-423 added logic to Linux'es netback driver to deal witha frontend splitting a packet in a     way such that not all of the headerswould come in one piece.  Unfortunately the logic introduced     theredidn't account for the extreme case of the entire packet being splitinto as many pieces as permitted     by the protocol, yet still beingsmaller than the area that's specially dealt with to keep all     (possible)headers together.  Such an unusual packet would therefore trigger abuffer overrun in the driver.
    (CVE-2023-34319)

    An out-of-bounds read vulnerability was found in Netfilter Connection Tracking (conntrack) in the Linux     kernel. This flaw allows a remote user to disclose sensitive information via the DCCP protocol.
    (CVE-2023-39197)

    A use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in     the Linux Kernel. This flaw allows a local attacker to perform a local privilege escalation due to     incorrect handling of the existing filter, leading to a kernel information leak issue. (CVE-2023-4128)

    A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to     bypass network filters and gain unauthorized access to some resources. The original patches fixing     CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits -     a096ccca6e50 (tun: tun_chr_open(): correctly initialize socket uid), - 66b2c338adce (tap: tap_open():
    correctly initialize socket uid), pass inode->i_uid to sock_init_data_uid() as the last parameter and     that turns out to not be accurate. (CVE-2023-4194)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to     achieve local privilege escalation.

    When route4_change() is called on an existing filter, the whole tcf_result struct is always copied into     the new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8. (CVE-2023-4206)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to     achieve local privilege escalation.

    When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec. (CVE-2023-4207)

    A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to     achieve local privilege escalation.

    When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the     new instance of the filter. This causes a problem when updating a filter bound to a class, as     tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the     still referenced class and allowing it to be deleted, leading to a use-after-free.

    We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81. (CVE-2023-4208)

    In the Linux kernel before 6.4.5, drivers/gpu/drm/drm_atomic.c has a use-after-free during a race     condition between a nonblocking atomic commit and a driver unload. (CVE-2023-51043)

    A denial of service vulnerability due to a deadlock was found in sctp_auto_asconf_init in     net/sctp/socket.c in the Linux kernel's SCTP subsystem. This flaw allows guests with local user privileges     to trigger a deadlock and potentially crash the system. (CVE-2024-0639)

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-5.4-2023-054)

high Nessus Plugin ID 182659

Version 1.6

Version 1.4

Version 1.3

Version 1.2

Version 1.1

Version 1.0

Version 1.6 Jul 5, 2024, 2:41 PM CVE (set "CVE" coverage to "CVE-2023-1611,CVE-2023-3212,CVE-2023-34319,CVE-2023-39197,CVE-2023-4128,CVE-2023-4194,CVE-2023-4206,CVE-2023-4207,CVE-2023-4208,CVE-2023-51043,CVE-2024-0639") CVSS metrics ("CVSSv2 score" set to 7.8) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N") CVSSv2 score source (changed from "CVE-2023-4208" to "CVE-2023-39197") CVSSv2 severity (based on CVE-2023-39197, severity increased from "Medium" to "High") CVSSv3 score source (set to "CVE-2023-4208") Detection (updated detection logic) Plugin metadata Plugin Feed: 202407051441
Version 1.4 Dec 15, 2023, 2:39 PM CVSSv2 score source (changed from "CVE-2023-34319" to "CVE-2023-4208") Plugin Feed: 202312151439
Version 1.3 Nov 15, 2023, 2:17 PM CVSSv2 score source (changed from "CVE-2023-4128" to "CVE-2023-34319") Plugin Feed: 202311151417
Version 1.2 Oct 17, 2023, 6:13 AM Plugin metadata Exploit attributes ("Exploit available" set to "True". "Exploitability ease" changed from "No known exploits are available" to "Exploits are available") Detection CVSSv3 score source (set to "CVE-2023-4128") CVSSv2 score source (changed from "CVE-2023-4208" to "CVE-2023-4128") 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") CVSS metrics ("CVSSv2 score" changed from 6.1 to 6.8. "CVSSv2 vector" changed from "CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:C" to "CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C") CVE (set "CVE" coverage to "CVE-2023-3212,CVE-2023-34319,CVE-2023-4128,CVE-2023-4194,CVE-2023-4206,CVE-2023-4207,CVE-2023-4208") Plugin Feed: 202310170613
Version 1.1 Oct 6, 2023, 5:06 PM CVSS metrics ("CVSSv2 score" changed from 6.8 to 6.1. "CVSSv2 vector" changed from "CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C" to "CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:C") Plugin Feed: 202310061706
Version 1.0 Oct 6, 2023, 10:25 AM New Plugin Feed: 202310061025