Detections
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Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-184)

high Nessus Plugin ID 176925

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-184 advisory.

 - A deadlock flaw was found in the Linux kernel's BPF subsystem. This flaw allows a local user to potentially crash the system. (CVE-2023-0160)

 - A denial of service problem was found, due to a possible recursive locking scenario, resulting in a deadlock in table_clear in drivers/md/dm-ioctl.c in the Linux Kernel Device Mapper-Multipathing sub- component. (CVE-2023-2269)

 - In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled. (CVE-2023-32233)

 - An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend against attackers with the stated When modifying the block device while it is mounted by the filesystem access.
 (CVE-2023-34256)

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

Solution

Run 'dnf update kernel --releasever 2023.0.20230607' to update your system.

See Also

https://alas.aws.amazon.com/AL2023/ALAS-2023-184.html

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

https://alas.aws.amazon.com/cve/html/CVE-2023-0160.html

https://alas.aws.amazon.com/cve/html/CVE-2023-2269.html

https://alas.aws.amazon.com/cve/html/CVE-2023-32233.html

https://alas.aws.amazon.com/cve/html/CVE-2023-34256.html

Plugin Details

Severity: High

ID: 176925

File Name: al2023_ALAS2023-2023-184.nasl

Version: 1.6

Type: local

Agent: unix

Published: 6/8/2023

Updated: 3/4/2024

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

Risk Information

VPR

Risk Factor: High

Score: 8.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

CVSS Score Source: CVE-2023-32233

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:kernel-libbpf, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:python3-perf, p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:kernel-headers, p-cpe:/a:amazon:linux:kernel-tools-devel, p-cpe:/a:amazon:linux:bpftool-debuginfo, p-cpe:/a:amazon:linux:python3-perf-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:bpftool, p-cpe:/a:amazon:linux:kernel-livepatch-6.1.29-47.49, p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:kernel-libbpf-devel, p-cpe:/a:amazon:linux:kernel-libbpf-static, p-cpe:/a:amazon:linux:perf-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: 5/25/2023

Vulnerability Publication Date: 4/25/2023

Exploitable With

Core Impact

Reference Information

CVE: CVE-2023-0160, CVE-2023-2269, CVE-2023-32233, CVE-2023-34256