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Ubuntu 20.04 LTS : Linux kernel (IoT) vulnerabilities (USN-6726-2)

high Nessus Plugin ID 193376

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Synopsis

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

Description

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6726-2 advisory.

 Pratyush Yadav discovered that the Xen network backend implementation in the Linux kernel did not properly handle zero length data request, leading to a null pointer dereference vulnerability. An attacker in a guest VM could possibly use this to cause a denial of service (host domain crash). (CVE-2023-46838)

 It was discovered that the IPv6 implementation of the Linux kernel did not properly manage route cache memory usage. A remote attacker could use this to cause a denial of service (memory exhaustion).
 (CVE-2023-52340)

 It was discovered that the device mapper driver in the Linux kernel did not properly validate target size during certain memory allocations. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-52429, CVE-2024-23851)

 Dan Carpenter discovered that the netfilter subsystem in the Linux kernel did not store data in properly sized memory locations. A local user could use this to cause a denial of service (system crash).
 (CVE-2024-0607)

 Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

 - Architecture specifics;

 - Cryptographic API;

 - Android drivers;

 - EDAC drivers;

 - GPU drivers;

 - Media drivers;

 - MTD block device drivers;

 - Network drivers;

 - NVME drivers;

 - TTY drivers;

 - Userspace I/O drivers;

 - F2FS file system;

 - GFS2 file system;

 - IPv6 Networking;

 - AppArmor security module; (CVE-2023-52464, CVE-2023-52448, CVE-2023-52457, CVE-2023-52443, CVE-2023-52439, CVE-2023-52612, CVE-2024-26633, CVE-2024-26597, CVE-2023-52449, CVE-2023-52444, CVE-2023-52609, CVE-2023-52469, CVE-2023-52445, CVE-2023-52451, CVE-2023-52470, CVE-2023-52454, CVE-2023-52436, CVE-2023-52438)

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-6726-2

Plugin Details

Severity: High

ID: 193376

File Name: ubuntu_USN-6726-2.nasl

Version: 1.2

Type: local

Agent: unix

Published: 4/17/2024

Updated: 8/27/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, 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

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

CVSS Score Source: CVE-2023-52469

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1034-iot, cpe:/o:canonical:ubuntu_linux:20.04:-:lts

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/16/2024

Vulnerability Publication Date: 1/18/2024

Reference Information

CVE: CVE-2023-46838, CVE-2023-52340, CVE-2023-52429, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439, CVE-2023-52443, CVE-2023-52444, CVE-2023-52445, CVE-2023-52448, CVE-2023-52449, CVE-2023-52451, CVE-2023-52454, CVE-2023-52457, CVE-2023-52464, CVE-2023-52469, CVE-2023-52470, CVE-2023-52609, CVE-2023-52612, CVE-2024-0607, CVE-2024-23851, CVE-2024-26597, CVE-2024-26633

USN: 6726-2