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Ubuntu 14.04 LTS : Linux kernel (Wily HWE) vulnerability (USN-2807-1)

critical Nessus Plugin ID 86847

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 14.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-2807-1 advisory.

 Ben Serebrin discovered that the KVM hypervisor implementation in the Linux kernel did not properly catch Alignment Check exceptions. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS.

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-2807-1

Plugin Details

Severity: Critical

ID: 86847

File Name: ubuntu_USN-2807-1.nasl

Version: 2.14

Type: local

Agent: unix

Published: 11/11/2015

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: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2015-5307

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-18-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-18-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-18-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-18-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-18-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-18-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2.0-18-powerpc64-smp

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/10/2015

Vulnerability Publication Date: 11/16/2015

Reference Information

CVE: CVE-2015-5307

USN: 2807-1