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Ubuntu 18.04 ESM / 20.04 LTS : Linux kernel vulnerabilities (USN-6417-1)

medium Nessus Plugin ID 182578

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 18.04 ESM / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6417-1 advisory.

 It was discovered that the eBPF implementation in the Linux kernel contained a race condition around read- only maps. A privileged attacker could use this to modify read-only maps. (CVE-2021-4001)

 It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service (excessive CPU consumption). (CVE-2023-1206)

 Yang Lan discovered that the GFS2 file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious GFS2 image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-3212)

 Davide Ornaghi discovered that the DECnet network protocol implementation in the Linux kernel contained a null pointer dereference vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Please note that kernel support for the DECnet has been removed to resolve this CVE. (CVE-2023-3338)

 It was discovered that the NFC implementation in the Linux kernel contained a use-after-free vulnerability when performing peer-to-peer communication in certain conditions. A privileged attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory).
 (CVE-2023-3863)

 It was discovered that the TUN/TAP driver in the Linux kernel did not properly initialize socket data. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-4194)

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-6417-1

Plugin Details

Severity: Medium

ID: 182578

File Name: ubuntu_USN-6417-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 10/5/2023

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-4001

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

CVSS Score Source: CVE-2023-4194

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-164-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1031-xilinx-zynqmp, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1095-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1111-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1100-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-164-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1058-ibm, cpe:/o:canonical:ubuntu_linux:18.04:-:esm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1072-bluefield, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1078-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1110-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1115-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1117-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-164-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1023-iot

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/4/2023

Vulnerability Publication Date: 1/21/2022

Reference Information

CVE: CVE-2021-4001, CVE-2023-1206, CVE-2023-3212, CVE-2023-3338, CVE-2023-3863, CVE-2023-4194

USN: 6417-1