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Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5468-1)

high Nessus Plugin ID 161956

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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-5468-1 advisory.

 It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. (CVE-2022-21499)

 Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the removal of stateful expressions in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.
 (CVE-2022-1966)

 Qiuhao Li, Gaoning Pan and Yongkang Jia discovered that the KVM implementation in the Linux kernel did not properly perform guest page table updates in some situations. An attacker in a guest vm could possibly use this to crash the host OS. (CVE-2022-1158)

 Ziming Zhang discovered that the netfilter subsystem in the Linux kernel did not properly validate sets with multiple ranged fields. A local attacker could use this to cause a denial of service or execute arbitrary code. (CVE-2022-1972)

 It was discovered that the USB Gadget file system interface in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-24958)

 It was discovered that the EMS CAN/USB interface implementation in the Linux kernel contained a double- free vulnerability when handling certain error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2022-28390)

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-5468-1

Plugin Details

Severity: High

ID: 161956

File Name: ubuntu_USN-5468-1.nasl

Version: 1.9

Type: local

Agent: unix

Published: 6/8/2022

Updated: 8/28/2024

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: 4.6

Temporal Score: 3.6

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

CVSS Score Source: CVE-2022-28390

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:canonical:ubuntu_linux:linux-image-5.13.0-1033-oracle, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-48-generic-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-1030-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-48-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-1014-intel, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-1028-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-48-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-48-lowlatency

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/8/2022

Vulnerability Publication Date: 2/11/2022

Reference Information

CVE: CVE-2022-1158, CVE-2022-21499, CVE-2022-24958, CVE-2022-28390

USN: 5468-1