Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerability (USN-5240-1)

high Nessus Plugin ID 156879

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-5240-1 advisory.

- A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system. (CVE-2022-0185)

Note that Nessus has not tested for this issue 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-5240-1

Plugin Details

Severity: High

ID: 156879

File Name: ubuntu_USN-5240-1.nasl

Version: 1.10

Type: local

Agent: unix

Published: 1/20/2022

Updated: 1/9/2024

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6

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

CVSS Score Source: CVE-2022-0185

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.8

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.10.0-1057-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1027-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1027-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1027-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.11.0-1028-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.13.0-1028-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.14.0-1020-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1012-ibm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1025-bluefield, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1031-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1050-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1053-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1059-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1061-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1062-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1063-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1067-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-96-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-96-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-96-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: 1/19/2022

Vulnerability Publication Date: 1/19/2022

Exploitable With

Core Impact

Reference Information

CVE: CVE-2022-0185

USN: 5240-1