Ubuntu 14.04 LTS : Linux kernel vulnerabilities (USN-2318-1)

high Nessus Plugin ID 77237

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-2318-1 advisory.

- The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a mount -o remount command within a user namespace. (CVE-2014-5206)

- fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID, and MNT_NOEXEC and changing MNT_ATIME_MASK during a remount of a bind mount, which allows local users to gain privileges, interfere with backups and auditing on systems that had atime enabled, or cause a denial of service (excessive filesystem updating) on systems that had atime disabled via a mount
-o remount command within a user namespace. (CVE-2014-5207)

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-2318-1

Plugin Details

Severity: High

ID: 77237

File Name: ubuntu_USN-2318-1.nasl

Version: 1.13

Type: local

Agent: unix

Published: 8/18/2014

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: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2014-5206

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.3

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

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

CVSS Score Source: CVE-2014-5207

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-34-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-34-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-34-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-34-powerpc-e500, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-34-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-34-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-34-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13.0-34-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 Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/18/2014

Vulnerability Publication Date: 8/18/2014

Reference Information

CVE: CVE-2014-5206, CVE-2014-5207

BID: 69214, 69216

USN: 2318-1