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Ubuntu 16.04 LTS : Linux kernel vulnerability (USN-4303-1)

medium Nessus Plugin ID 134661

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4303-1 advisory.

 Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker could use this to expose sensitive information.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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-4303-1

Plugin Details

Severity: Medium

ID: 134661

File Name: ubuntu_USN-4303-1.nasl

Version: 1.9

Type: local

Agent: unix

Published: 3/18/2020

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Low

Base Score: 2.3

Temporal Score: 1.7

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

CVSS Score Source: CVE-2020-2732

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-176-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-176-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-176-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-176-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-176-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-176-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1130-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1068-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1134-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1104-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-176-generic

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/17/2020

Vulnerability Publication Date: 4/8/2020

Reference Information

CVE: CVE-2020-2732

USN: 4303-1