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Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3234-2)

medium Nessus Plugin ID 97779

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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-3234-2 advisory.

 USN-3234-1 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.

 Ralf Spenneberg discovered that the ext4 implementation in the Linux kernel did not properly validate meta block groups. An attacker with physical access could use this to specially craft an ext4 image that causes a denial of service (system crash). (CVE-2016-10208)

 It was discovered that the Linux kernel did not clear the setgid bit during a setxattr call on a tmpfs filesystem. A local attacker could use this to gain elevated group privileges. (CVE-2017-5551)

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-3234-2

Plugin Details

Severity: Medium

ID: 97779

File Name: ubuntu_USN-3234-2.nasl

Version: 3.11

Type: local

Agent: unix

Published: 3/16/2017

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: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

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

CVSS Score Source: CVE-2017-5551

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-67-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-67-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-67-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-67-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-67-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-67-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-67-powerpc-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: 3/15/2017

Vulnerability Publication Date: 2/6/2017

Reference Information

CVE: CVE-2016-10208, CVE-2017-5551

USN: 3234-2