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Sicherheit: Ausführen von Code mit höheren Privilegien in PolicyKit
Aktuelle Meldungen Distributionen
Name: Ausführen von Code mit höheren Privilegien in PolicyKit
ID: USN-3934-1
Distribution: Ubuntu
Plattformen: Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 18.10
Datum: Mi, 3. April 2019, 16:39
Referenzen: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6133
Applikationen: policykit

Originalnachricht

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From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <795ced72-7486-500b-3253-cdb6f667b57d@canonical.com>
Subject: [USN-3934-1] PolicyKit vulnerability

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==========================================================================
Ubuntu Security Notice USN-3934-1
April 03, 2019

policykit-1 vulnerability
==========================================================================

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


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