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

medium Nessus Plugin ID 95993

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.

- fs/namespace.c in the Linux kernel before 4.9 does not restrict how many mounts may exist in a mount namespace, which allows local users to cause a denial of service (memory consumption and deadlock) via MS_BIND mount system calls, as demonstrated by a loop that triggers exponential growth in the number of mounts. (CVE-2016-6213)

- Race condition in the environ_read function in fs/proc/base.c in the Linux kernel before 4.5.4 allows local users to obtain sensitive information from kernel memory by reading a /proc/*/environ file during a process-setup time interval in which environment-variable copying is incomplete. (CVE-2016-7916)

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: 3.11

Type: local

Agent: unix

Published: 12/21/2016

Updated: 1/9/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, 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-generic, 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-lowlatency, 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-e500mc, 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-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-106-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:14.04:-:lts

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

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