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Ubuntu 14.04 LTS / 16.04 LTS : Linux kernel (HWE) vulnerability (USN-3256-2)

high Nessus Plugin ID 99198

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-3256-2 advisory.

 USN-3256-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel for each of the respective prior Ubuntu LTS releases.

 Andrey Konovalov discovered that the AF_PACKET implementation in the Linux kernel did not properly validate certain block-size data. A local attacker could use this to cause a denial of service (system crash).

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-3256-2

Plugin Details

Severity: High

ID: 99198

File Name: ubuntu_USN-3256-2.nasl

Version: 3.16

Type: local

Agent: unix

Published: 4/5/2017

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2017-7308

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-72-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.8.0-46-lowlatency, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-72-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-72-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-72-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-72-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.8.0-46-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-72-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.8.0-46-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-72-powerpc-smp

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/4/2017

Vulnerability Publication Date: 3/29/2017

Exploitable With

Core Impact

Metasploit (AF_PACKET packet_set_ring Privilege Escalation)

Reference Information

CVE: CVE-2017-7308

USN: 3256-2