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             AUSCERT External Security Bulletin Redistribution

                               ESB-2022.0360
                          PolicyKit vulnerability
                              27 January 2022

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

Product:           PolicyKit
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-4034  

Reference:         ESB-2022.0352

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-5252-1
   https://ubuntu.com/security/notices/USN-5252-2

Comment: This bulletin contains two (2) Ubuntu security advisories.

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USN-5252-1: PolicyKit vulnerability
25 January 2022

policykit-1 could be made to run programs as an administrator.
Releases

  o Ubuntu 21.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS

Packages

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

Details

It was discovered that the PolicyKit pkexec tool incorrectly handled
command-line arguments. A local attacker could use this issue to escalate
privileges to an administrator.

Update instructions

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

Ubuntu 21.10

  o policykit-1 - 0.105-31ubuntu0.1

Ubuntu 20.04

  o policykit-1 - 0.105-26ubuntu1.2

Ubuntu 18.04

  o policykit-1 - 0.105-20ubuntu0.18.04.6

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

References

  o CVE-2021-4034

Related notices

  o USN-5252-2 : policykit-1-doc, gir1.2-polkit-1.0, libpolkit-backend-1-dev,
    libpolkit-gobject-1-dev, libpolkit-gobject-1-0, libpolkit-agent-1-0,
    libpolkit-agent-1-dev, libpolkit-backend-1-0, policykit-1


- --------------------------------------------------------------------------------


USN-5252-2: PolicyKit vulnerability
25 January 2022

policykit-1 could be made to run programs as an administrator.
Releases

  o Ubuntu 16.04 ESM
  o Ubuntu 14.04 ESM

Packages

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

Details

USN-5252-1 fixed a vulnerability in policykit-1. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

It was discovered that the PolicyKit pkexec tool incorrectly handled
command-line arguments. A local attacker could use this issue to escalate
privileges to an administrator.

Update instructions

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

Ubuntu 16.04

  o policykit-1 - 0.105-14.1ubuntu0.5+esm1
    Available with UA Infra or UA Desktop

Ubuntu 14.04

  o policykit-1 - 0.105-4ubuntu3.14.04.6+esm1
    Available with UA Infra or UA Desktop

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

References

  o CVE-2021-4034

Related notices

  o USN-5252-1 : libpolkit-agent-1-0, gir1.2-polkit-1.0, libpolkit-backend-1-0,
    libpolkit-gobject-1-0, libpolkit-backend-1-dev, libpolkit-gobject-1-dev,
    policykit-1-doc, policykit-1, libpolkit-agent-1-dev

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

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