Amazon Linux 2 : kernel (ALAS-2023-2027)

high Nessus Plugin ID 175018

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of kernel installed on the remote host is prior to 4.14.313-235.533. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2027 advisory.

A use-after-free flaw was found in vhost_net_set_backend in drivers/vhost/net.c in virtio network subcomponent in the Linux kernel due to a double fget. This flaw could allow a local attacker to crash the system, and could even lead to a kernel information leak problem. (CVE-2023-1838)

An insufficient permission check has been found in the Bluetooth subsystem ofthe Linux kernel when handling ioctl system calls of HCI sockets. This causestasks without the proper CAP_NET_ADMIN capability can easily mark HCI socketsas _trusted_. Trusted sockets are intended to enable the sending and receivingof management commands and events, such as pairing or connecting with a newdevice. As a result, unprivileged users can acquire a trusted socket, leadingto unauthorized execution of management commands.
The exploit requires onlythe presence of a set of commonly used setuid programs (e.g., su, sudo).
(CVE-2023-2002)

An out-of-bounds memory access flaw was found in the Linux kernel's XFS file system in how a user restores an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2023-2124)

An out-of-bounds write vulnerability was found in the Linux kernel's SLIMpro I2C device driver. The userspace data->block[0] variable was not capped to a number between 0-255 and was used as the size of a memcpy, possibly writing beyond the end of dma_buffer. This flaw could allow a local privileged user to crash the system or potentially achieve code execution. (CVE-2023-2194)

cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results). (CVE-2023-23454)

The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in drivers/net/ethernet/qualcomm/emac/emac.c if a physically proximate attacker unplugs an emac based device.
(CVE-2023-33203)

In the Linux kernel, the following vulnerability has been resolved:

nilfs2: fix kernel-infoleak in nilfs_ioctl_wrap_copy() (CVE-2023-53035)

In the Linux kernel, the following vulnerability has been resolved:

dm stats: check for and propagate alloc_percpu failure (CVE-2023-53044)

In the Linux kernel, the following vulnerability has been resolved:

dm crypt: add cond_resched() to dmcrypt_write() (CVE-2023-53051)

In the Linux kernel, the following vulnerability has been resolved:

igb: revert rtnl_lock() that causes deadlock (CVE-2023-53060)

In the Linux kernel, the following vulnerability has been resolved:

net: usb: smsc95xx: Limit packet length to skb->len (CVE-2023-53062)

In the Linux kernel, the following vulnerability has been resolved:

scsi: scsi_dh_alua: Fix memleak for 'qdata' in alua_activate() (CVE-2023-53078)

In the Linux kernel, the following vulnerability has been resolved:

ocfs2: fix data corruption after failed write (CVE-2023-53081)

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.

Solution

Run 'yum update kernel' to update your system.

Plugin Details

Severity: High

ID: 175018

File Name: al2_ALAS-2023-2027.nasl

Version: 1.8

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 5/2/2023

Updated: 8/5/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2023-2124

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:kernel-headers, p-cpe:/a:amazon:linux:kernel-livepatch-4.14.313-235.533, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:kernel-tools-devel, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:python-perf, p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:perf-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:python-perf-debuginfo, p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:kernel-debuginfo

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/27/2023

Vulnerability Publication Date: 1/10/2023

Reference Information

CVE: CVE-2023-1838, CVE-2023-2002, CVE-2023-2124, CVE-2023-2194, CVE-2023-23454, CVE-2023-33203, CVE-2023-53035, CVE-2023-53044, CVE-2023-53051, CVE-2023-53060, CVE-2023-53062, CVE-2023-53078, CVE-2023-53081

Detections

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