Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title LightDM vulnerability
Informations
Name USN-3255-1 First vendor Publication 2017-04-04
Vendor Ubuntu Last vendor Modification 2017-04-04
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 6.9 Attack Range Local
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.10 - Ubuntu 16.04 LTS

Summary:

LightDM could be made to run programs as an administrator.

Software Description: - lightdm: Display Manager

Details:

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.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.10:
lightdm 1.19.5-0ubuntu1.1

Ubuntu 16.04 LTS:
lightdm 1.18.3-0ubuntu1.1

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-3255-1
CVE-2017-7358

Package Information:
https://launchpad.net/ubuntu/+source/lightdm/1.19.5-0ubuntu1.1
https://launchpad.net/ubuntu/+source/lightdm/1.18.3-0ubuntu1.1

Original Source

Url : http://www.ubuntu.com/usn/USN-3255-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Os 2

Nessus® Vulnerability Scanner

Date Description
2017-04-05 Name : The remote Ubuntu host is missing a security-related patch.
File : ubuntu_USN-3255-1.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
3
Date Informations
2017-04-11 21:23:27
  • Multiple Updates
2017-04-06 13:24:56
  • Multiple Updates
2017-04-05 12:04:47
  • Multiple Updates
2017-04-05 05:21:06
  • First insertion