Operating System:

[Ubuntu]

Published:

03 September 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.3336
                    USN-3934-2: PolicyKit vulnerability
                             3 September 2019

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           PolicyKit
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Unauthorised Access -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-6133  

Reference:         ESB-2019.2854
                   ESB-2019.1388
                   ESB-2019.1135
                   ESB-2019.0856
                   ESB-2019.2897.2

Original Bulletin: 
   https://usn.ubuntu.com/3934-2/

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USN-3934-2: PolicyKit vulnerability
2 September 2019

policykit-1 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 12.04 ESM

Summary

PolicyKit could allow unintended access.

Software Description

  o policykit-1 - framework for managing administrative policies and privileges

Details

USN-3934-1 fixed a vulnerability in Policykit. This update provides the
corresponding update for Ubuntu 12.04 ESM.

Original advisory 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 12.04 ESM
    libpolkit-backend-1-0 - 0.104-1ubuntu1.5
    policykit-1 - 0.104-1ubuntu1.5

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

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

References

  o USN-3934-1
  o CVE-2019-6133

- --------------------------END INCLUDED TEXT--------------------

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===========================================================================
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