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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.0472
                          gtk-vnc vulnerabilities
                             21 February 2017

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

Product:           gtk-vnc
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-5885 CVE-2017-5884 

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3203-1

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USN-3203-1: gtk-vnc vulnerabilities

Ubuntu Security Notice USN-3203-1

20th February, 2017

gtk-vnc vulnerabilities

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

Ubuntu 14.04 LTS

Ubuntu 12.04 LTS

Summary

gtk-vnc could be made to crash or run programs if it received specially 
crafted network traffic.

Software description

gtk-vnc - VNC viewer widget

Details

It was discovered that gtk-vnc incorrectly validated certain data. A
malicious server could use this issue to cause gtk-vnc to crash, resulting
in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 14.04 LTS:

libgtk-vnc-1.0-0 0.5.3-0ubuntu2.1

libgvnc-1.0-0 0.5.3-0ubuntu2.1

libgtk-vnc-2.0-0 0.5.3-0ubuntu2.1

Ubuntu 12.04 LTS:

libgtk-vnc-1.0-0 0.5.0-1ubuntu1.1

libgvnc-1.0-0 0.5.0-1ubuntu1.1

libgtk-vnc-2.0-0 0.5.0-1ubuntu1.1

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

In general, a standard system update will make all the necessary changes.

References

CVE-2017-5884, CVE-2017-5885

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