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Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-3160-1)

medium Nessus Plugin ID 95993

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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-3160-1 advisory.

 CAI Qian discovered that shared bind mounts in a mount namespace exponentially added entries without restriction to the Linux kernel's mount table. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-6213)

 It was discovered that a race condition existed in the procfs environ_read function in the Linux kernel, leading to an integer underflow. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2016-7916)

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-3160-1

Plugin Details

Severity: Medium

ID: 95993

File Name: ubuntu_USN-3160-1.nasl

Version: 3.12

Type: local

Agent: unix

Published: 12/21/2016

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: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 3.5

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

CVSS Score Source: CVE-2016-7916

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-generic, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-powerpc-e500, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-powerpc64-emb

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/20/2016

Vulnerability Publication Date: 11/16/2016

Reference Information

CVE: CVE-2016-6213, CVE-2016-7916

USN: 3160-1