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Ubuntu 16.04 LTS : LightDM vulnerability (USN-3255-1)

high Nessus Plugin ID 99196

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3255-1 advisory.

 It was discovered that LightDM incorrectly handled home directory creation for guest users. A local attacker could use this issue to gain ownership of arbitrary directory paths and possibly gain administrative privileges.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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 packages.

See Also

https://ubuntu.com/security/notices/USN-3255-1

Plugin Details

Severity: High

ID: 99196

File Name: ubuntu_USN-3255-1.nasl

Version: 3.12

Type: local

Agent: unix

Published: 4/5/2017

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: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.4

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

CVSS Score Source: CVE-2017-7358

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.6

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:liblightdm-qt-dev, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:liblightdm-qt5-3-dev, p-cpe:/a:canonical:ubuntu_linux:lightdm, p-cpe:/a:canonical:ubuntu_linux:liblightdm-gobject-1-dev, p-cpe:/a:canonical:ubuntu_linux:liblightdm-gobject-1-0, p-cpe:/a:canonical:ubuntu_linux:liblightdm-qt-3-0, p-cpe:/a:canonical:ubuntu_linux:gir1.2-lightdm-1, p-cpe:/a:canonical:ubuntu_linux:liblightdm-qt5-3-0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/4/2017

Vulnerability Publication Date: 4/5/2017

Reference Information

CVE: CVE-2017-7358

USN: 3255-1