Detections
Analytics

Ubuntu 15.10 : linux vulnerabilities (USN-2978-1)

high Nessus Plugin ID 91185

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Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

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).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected linux-image-4.2-generic, linux-image-4.2-generic-lpae and / or linux-image-4.2-lowlatency packages.

See Also

https://usn.ubuntu.com/2978-1/

Plugin Details

Severity: High

ID: 91185

File Name: ubuntu_USN-2978-1.nasl

Version: 2.13

Type: local

Agent: unix

Published: 5/17/2016

Updated: 1/12/2023

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: High

Base Score: 7.2

Temporal Score: 5.3

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

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: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2-generic-lpae, cpe:/o:canonical:ubuntu_linux:15.10, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.2-lowlatency

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

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: 2978-1