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Amazon Linux AMI : kernel (ALAS-2023-1706)

high Nessus Plugin ID 173273

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Synopsis

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

Description

The version of kernel installed on the remote host is prior to 4.14.305-155.531. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2023-1706 advisory.

 Guests can trigger NIC interface reset/abort/crash via netback It is possible for a guest to trigger a NIC interface reset/abort/crash in a Linux based network backend by sending certain kinds of packets. It appears to be an (unwritten?) assumption in the rest of the Linux network stack that packet protocol headers are all contained within the linear section of the SKB and some NICs behave badly if this is not the case. This has been reported to occur with Cisco (enic) and Broadcom NetXtrem II BCM5780 (bnx2x) though it may be an issue with other NICs/drivers as well. In case the frontend is sending requests with split headers, netback will forward those violating above mentioned assumption to the networking core, resulting in said misbehavior. (CVE-2022-3643)

 Guests can trigger deadlock in Linux netback driver T[his CNA information record relates to multiple CVEs;
 the text explains which aspects/vulnerabilities correspond to which CVE.] The patch for XSA-392 introduced another issue which might result in a deadlock when trying to free the SKB of a packet dropped due to the XSA-392 handling (CVE-2022-42328). Additionally when dropping packages for other reasons the same deadlock could occur in case of netpoll being active for the interface the xen-netback driver is connected to (CVE-2022-42329). (CVE-2022-42328)

 Guests can trigger deadlock in Linux netback driver T[his CNA information record relates to multiple CVEs;
 the text explains which aspects/vulnerabilities correspond to which CVE.] The patch for XSA-392 introduced another issue which might result in a deadlock when trying to free the SKB of a packet dropped due to the XSA-392 handling (CVE-2022-42328). Additionally when dropping packages for other reasons the same deadlock could occur in case of netpoll being active for the interface the xen-netback driver is connected to (CVE-2022-42329). (CVE-2022-42329)

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

 ipv6: avoid use-after-free in ip6_fragment() (CVE-2022-48956)

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

 memcg: fix possible use-after-free in memcg_write_event_control() (CVE-2022-48988)

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

 mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths (CVE-2022-48991)

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

 net: hsr: Fix potential use-after-free (CVE-2022-49015)

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

 dmaengine: Fix double increment of client_count in dma_chan_get() (CVE-2022-49753)

 The Linux kernel does not correctly mitigate SMT attacks, as discovered through a strange pattern in the kernel API using STIBP as a mitigation, leaving the process exposed for a short period of time after a syscall. The kernel also does not issue an IBPB immediately during the syscall. (CVE-2023-0045)

 A NULL pointer dereference flaw was found in rawv6_push_pending_frames in net/ipv6/raw.c in the network subcomponent in the Linux kernel. This flaw causes the system to crash. (CVE-2023-0394)

 Detected a few exploitable gadgets that could leak secret memory through a side-channel such as MDS as well as insufficient hardening of the usercopy functions against spectre-v1. (CVE-2023-0459)

 There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not require any privilege.

 There is a use-after-free bug of icsk_ulp_data of a struct inet_connection_sock.

 When CONFIG_TLS is enabled, user can install a tls context (struct tls_context) on a connected tcp socket.
 The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable.

 The setsockopt TCP_ULP operation does not require any privilege.

 We recommend upgrading past commit 2c02d41d71f90a5168391b6a5f2954112ba2307c (CVE-2023-0461)

 A memory corruption flaw was found in the Linux kernel's human interface device (HID) subsystem in how a user inserts a malicious USB device. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2023-1073)

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.

See Also

https://alas.aws.amazon.com/ALAS-2023-1706.html

https://alas.aws.amazon.com/faqs.html

https://alas.aws.amazon.com/cve/html/CVE-2022-3643.html

https://alas.aws.amazon.com/cve/html/CVE-2022-42328.html

https://alas.aws.amazon.com/cve/html/CVE-2022-42329.html

https://alas.aws.amazon.com/cve/html/CVE-2022-48956.html

https://alas.aws.amazon.com/cve/html/CVE-2022-48988.html

https://alas.aws.amazon.com/cve/html/CVE-2022-48991.html

https://alas.aws.amazon.com/cve/html/CVE-2022-49015.html

https://alas.aws.amazon.com/cve/html/CVE-2022-49753.html

https://alas.aws.amazon.com/cve/html/CVE-2023-0045.html

https://alas.aws.amazon.com/cve/html/CVE-2023-0394.html

https://alas.aws.amazon.com/cve/html/CVE-2023-0459.html

https://alas.aws.amazon.com/cve/html/CVE-2023-0461.html

https://alas.aws.amazon.com/cve/html/CVE-2023-1073.html

Plugin Details

Severity: High

ID: 173273

File Name: ala_ALAS-2023-1706.nasl

Version: 1.16

Type: local

Agent: unix

Published: 3/22/2023

Updated: 4/25/2025

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2023-0045

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

CVSS Score Source: CVE-2023-0461

Vulnerability Information

CPE: 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-tools-devel, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel-headers, p-cpe:/a:amazon:linux:kernel-debuginfo-common-i686, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, cpe:/o:amazon:linux

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: 3/17/2023

Vulnerability Publication Date: 12/7/2022

Reference Information

CVE: CVE-2022-3643, CVE-2022-42328, CVE-2022-42329, CVE-2022-48956, CVE-2022-48988, CVE-2022-48991, CVE-2022-49015, CVE-2022-49753, CVE-2023-0045, CVE-2023-0394, CVE-2023-0459, CVE-2023-0461, CVE-2023-1073