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Ubuntu 14.04 LTS : Linux kernel (Vivid HWE) vulnerability (USN-2857-2)

medium Nessus Plugin ID 87758

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 14.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-2857-2 advisory.

 - The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr operations, which allows local users to bypass intended access restrictions and modify the attributes of arbitrary overlay files via a crafted application. (CVE-2015-8660)

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-2857-2

Plugin Details

Severity: Medium

ID: 87758

File Name: ubuntu_USN-2857-2.nasl

Version: 2.19

Type: local

Agent: unix

Published: 1/6/2016

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: Critical

Score: 9.6

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-2015-8660

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-43-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-43-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-43-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-43-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-43-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-43-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-3.19.0-43-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: 1/5/2016

Vulnerability Publication Date: 12/28/2015

Exploitable With

CANVAS (CANVAS)

Core Impact

Metasploit (Overlayfs Privilege Escalation)

Reference Information

CVE: CVE-2015-8660

USN: 2857-2