6.9 - USN-932-1

Executive Summary

Summary
Title	KDM vulnerability

Informations
Name	USN-932-1	First vendor Publication	2010-04-19
Vendor	Ubuntu	Last vendor Modification	2010-04-19
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 the following Ubuntu releases:

Ubuntu 8.10 Ubuntu 9.04 Ubuntu 9.10

This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.

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

Ubuntu 8.10:
kdm 4:4.1.4-0ubuntu1~intrepid3.2

Ubuntu 9.04:
kdm 4:4.2.2-0ubuntu2.1

Ubuntu 9.10:
kdm 4:4.3.2-0ubuntu7.2

After a standard system upgrade you need to reboot your computer to effect the necessary changes.

Details follow:

Sebastian Krahmer discovered a race condition in the KDE Display Manager (KDM). A local attacker could exploit this to change the permissions on arbitrary files, thus allowing privilege escalation.