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Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-2979-2)

high Nessus Plugin ID 91189

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Synopsis

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

Description

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-2979-2 advisory.

 USN-2979-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS.

 David Matlack discovered that the Kernel-based Virtual Machine (KVM) implementation in the Linux kernel did not properly restrict variable Memory Type Range Registers (MTRR) in KVM guests. A privileged user in a guest VM could use this to cause a denial of service (system crash) in the host, expose sensitive information from the host, or possibly gain administrative privileges in the host. (CVE-2016-3713)

 Philip Pettersson discovered that the Linux kernel's ASN.1 DER decoder did not properly process certificate files with tags of indefinite length. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges.
 (CVE-2016-0758)

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-2979-2

Plugin Details

Severity: High

ID: 91189

File Name: ubuntu_USN-2979-2.nasl

Version: 2.16

Type: local

Agent: unix

Published: 5/17/2016

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: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2016-0758

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: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-22-lowlatency

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/16/2016

Vulnerability Publication Date: 6/27/2016

Reference Information

CVE: CVE-2016-0758, CVE-2016-3713

USN: 2979-2