ESB-2018.2066.2 - UPDATE [Linux][Ubuntu] policykit: Multiple vulnerabilities 2018-07-18

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             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.2066.2
                         PolicyKit vulnerabilities
                               18 July 2018

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

Product:           policykit
Publisher:         Ubuntu
Operating System:  Ubuntu
                   Linux variants
Impact/Access:     Increased Privileges     -- Existing Account
                   Denial of Service        -- Existing Account
                   Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1116 CVE-2015-4625 CVE-2015-3255
                   CVE-2015-3218  

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3717-1
   http://www.ubuntu.com/usn/usn-3717-2

Comment: This bulletin contains two (2) Ubuntu security advisories.
         
         This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running policykit check for an updated version of the software for 
         their operating system.

Revision History:  July 18 2018: This update provides the corresponding 
                                 update for Ubuntu 12.04 ESM.
                   July 17 2018: Initial Release

- --------------------------BEGIN INCLUDED TEXT--------------------

==========================================================================
Ubuntu Security Notice USN-3717-1
July 16, 2018

policykit-1 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- - - Ubuntu 18.04 LTS
- - - Ubuntu 17.10
- - - Ubuntu 16.04 LTS
- - - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in PolicyKit.

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

Details:

Tavis Ormandy discovered that PolicyKit incorrectly handled certain invalid
object paths. A local attacker could possibly use this issue to cause
PolicyKit to crash, resulting in a denial of service. This issue only
affected Ubuntu 14.04 LTS. (CVE-2015-3218)

It was discovered that PolicyKit incorrectly handled certain duplicate
action IDs. A local attacker could use this issue to cause PolicyKit to
crash, resulting in a denial of service, or possibly escalate privileges.
This issue only affected Ubuntu 14.04 LTS. (CVE-2015-3255)

Tavis Ormandy discovered that PolicyKit incorrectly handled duplicate
cookie values. A local attacker could use this issue to cause PolicyKit to
crash, resulting in a denial of service, or possibly escalate privileges.
This issue only affected Ubuntu 14.04 LTS. (CVE-2015-4625)

Matthias Gerstner discovered that PolicyKit incorrectly checked users. A
local attacker could possibly use this issue to cause authentication
dialogs to show up for other users, leading to a denial of service or an
information leak. (CVE-2018-1116)

Update instructions:

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

Ubuntu 18.04 LTS:
  libpolkit-backend-1-0           0.105-20ubuntu0.18.04.1

Ubuntu 17.10:
  libpolkit-backend-1-0           0.105-18ubuntu0.1

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

Ubuntu 14.04 LTS:
  libpolkit-backend-1-0           0.105-4ubuntu3.14.04.2

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

References:
  https://usn.ubuntu.com/usn/usn-3717-1
  CVE-2015-3218, CVE-2015-3255, CVE-2015-4625, CVE-2018-1116

Package Information:
  https://launchpad.net/ubuntu/+source/policykit-1/0.105-20ubuntu0.18.04.1
  https://launchpad.net/ubuntu/+source/policykit-1/0.105-18ubuntu0.1
  https://launchpad.net/ubuntu/+source/policykit-1/0.105-14.1ubuntu0.1
  https://launchpad.net/ubuntu/+source/policykit-1/0.105-4ubuntu3.14.04.2


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

==========================================================================
Ubuntu Security Notice USN-3717-2
July 17, 2018

policykit-1 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- - Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in PolicyKit.

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

Details:

USN-3717-1 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 handled certain duplicate
  action IDs. A local attacker could use this issue to cause PolicyKit
  to crash, resulting in a denial of service, or possibly escalate
  privileges. (CVE-2015-3255)

  Matthias Gerstner discovered that PolicyKit incorrectly checked users.
  A local attacker could possibly use this issue to cause authentication
  dialogs to show up for other users, leading to a denial of service or
  an information leak. (CVE-2018-1116)

Update instructions:

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

Ubuntu 12.04 ESM:
   libpolkit-backend-1-0                      0.104-1ubuntu1.2

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

References:
   https://usn.ubuntu.com/usn/usn-3717-2
   https://usn.ubuntu.com/usn/usn-3717-1
   CVE-2015-3255, CVE-2018-1116

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

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