Executive Summary

Summary
Title PolicyKit vulnerability
Informations
Name USN-3934-1 First vendor Publication 2019-04-03
Vendor Ubuntu Last vendor Modification 2019-04-03
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:P/I:P/A:P)
Cvss Base Score 4.4 Attack Range Local
Cvss Impact Score 6.4 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 18.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

PolicyKit could allow unintended access.

Software Description: - policykit-1: framework for managing administrative policies and privileges

Details:

It was discovered that PolicyKit incorrectly relied on the fork() system call in the Linux kernel being atomic. A local attacker could possibly use this issue to gain access to services that have cached authorizations.

Update instructions:

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

Ubuntu 18.10:
libpolkit-backend-1-0 0.105-21ubuntu0.4
policykit-1 0.105-21ubuntu0.4

Ubuntu 18.04 LTS:
libpolkit-backend-1-0 0.105-20ubuntu0.18.04.5
policykit-1 0.105-20ubuntu0.18.04.5

Ubuntu 16.04 LTS:
libpolkit-backend-1-0 0.105-14.1ubuntu0.5
policykit-1 0.105-14.1ubuntu0.5

Ubuntu 14.04 LTS:
libpolkit-backend-1-0 0.105-4ubuntu3.14.04.6
policykit-1 0.105-4ubuntu3.14.04.6

After a standard system update you need to reboot your computer to make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3934-1
CVE-2019-6133

Package Information:
https://launchpad.net/ubuntu/+source/policykit-1/0.105-21ubuntu0.4
https://launchpad.net/ubuntu/+source/policykit-1/0.105-20ubuntu0.18.04.5
https://launchpad.net/ubuntu/+source/policykit-1/0.105-14.1ubuntu0.5
https://launchpad.net/ubuntu/+source/policykit-1/0.105-4ubuntu3.14.04.6

Original Source

Url : http://www.ubuntu.com/usn/USN-3934-1

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-362 Race Condition

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 5
Os 1
Os 2
Os 2
Os 2
Os 1
Os 1
Os 2

Alert History

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0
1
Date Informations
2019-09-03 12:06:49
  • Multiple Updates
2019-04-03 17:18:43
  • First insertion