ESB-2018.2582 - [Ubuntu] libx11: Multiple vulnerabilities 2018-08-31

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2582
                          libx11 vulnerabilities
                              31 August 2018

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

Product:           libx11
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Access Privileged Data          -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-14600 CVE-2018-14599 CVE-2018-14598
                   CVE-2016-7943 CVE-2016-7942 

Reference:         ASB-2017.0219
                   ESB-2018.2562

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3758-1
   http://www.ubuntu.com/usn/usn-3758-2

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

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USN-3758-1: libx11 vulnerabilities

30 August 2018

libx11 vulnerabilities

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

  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS

Summary

Several security issues were fixed in libx11.

Software Description

  o libx11 - X11 client-side library

Details

Tobias Stoeckmann discovered that libx11 incorrectly handled certain images. An
attacker could possibly use this issue to access sensitive information
(CVE-2016-7942)

Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs. An
attacker could possibly use this issue to access sensitive information.
(CVE-2016-7943)

It was discovered that libx11 incorrectly handled certain inputs. An attacker
could possibly use this issue to cause a denial of service. (CVE-2018-14598,
CVE-2018-14599, CVE-2018-14600)

Update instructions

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

Ubuntu 18.04 LTS
    libx11-6 - 2:1.6.4-3ubuntu0.1
    libx11-dev - 2:1.6.4-3ubuntu0.1
Ubuntu 16.04 LTS
    libx11-6 - 2:1.6.3-1ubuntu2.1
    libx11-dev - 2:1.6.3-1ubuntu2.1
Ubuntu 14.04 LTS
    libx11-6 - 2:1.6.2-1ubuntu2.1
    libx11-dev - 2:1.6.2-1ubuntu2.1

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 CVE-2016-7942
  o CVE-2016-7943
  o CVE-2018-14598
  o CVE-2018-14599
  o CVE-2018-14600

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

USN-3758-2: libx11 vulnerabilities

30 August 2018

libx11 vulnerabilities

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

  o Ubuntu 12.04 ESM

Summary

Several security issues were fixed in libx11.

Software Description

  o libx11 - X11 client-side library

Details

USN-3758-1 fixed several vulnerabilities in libx11. This update provides the
corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Tobias Stoeckmann discovered that libx11 incorrectly handled certain images. An
attacker could possibly use this issue to access sensitive information
(CVE-2016-7942)

Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs. An
attacker could possibly use this issue to access sensitive information.
(CVE-2016-7943)

It was discovered that libx11 incorrectly handled certain inputs. An attacker
could possibly use this issue to cause a denial of service. (CVE-2018-14598,
CVE-2018-14599, CVE-2018-14600)

Update instructions

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

Ubuntu 12.04 ESM
    libx11-6 - 2:1.4.99.1-0ubuntu2.4
    libx11-dev - 2:1.4.99.1-0ubuntu2.4

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-3758-1
  o CVE-2016-7942
  o CVE-2016-7943
  o CVE-2018-14598
  o CVE-2018-14599
  o CVE-2018-14600

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

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