libvncclient1: Multiple vulnerabilities

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0298
                       LibVNCServer vulnerabilities
                              1 February 2019

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

Product:           libvncclient1
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
                   Access Confidential Data        -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-20750 CVE-2018-20749 CVE-2018-20748
                   CVE-2018-20024 CVE-2018-20023 CVE-2018-20022
                   CVE-2018-20021 CVE-2018-20020 CVE-2018-20019
                   CVE-2018-15127 CVE-2018-15126 CVE-2018-6307

Reference:         ESB-2019.0295
                   ESB-2019.0123
                   ESB-2019.0121
                   ESB-2019.0114
                   ESB-2019.0009

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3877-1

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USN-3877-1: LibVNCServer vulnerabilities

31 January 2019
libvncserver vulnerabilities

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

    Ubuntu 18.10
    Ubuntu 18.04 LTS
    Ubuntu 16.04 LTS
    Ubuntu 14.04 LTS

Summary

Several security issues were fixed in LibVNCServer.

Software Description

    libvncserver - vnc server library

Details

It was discovered that LibVNCServer incorrectly handled certain operations. A
remote attacker able to connect to applications using LibVNCServer could
possibly use this issue to obtain sensitive information, cause a denial of
service, or execute arbitrary code.

Update instructions

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

Ubuntu 18.10
    libvncclient1 - 0.9.11+dfsg-1.1ubuntu0.1
    libvncserver1 - 0.9.11+dfsg-1.1ubuntu0.1
Ubuntu 18.04 LTS
    libvncclient1 - 0.9.11+dfsg-1ubuntu1.1
    libvncserver1 - 0.9.11+dfsg-1ubuntu1.1
Ubuntu 16.04 LTS
    libvncclient1 - 0.9.10+dfsg-3ubuntu0.16.04.3
    libvncserver1 - 0.9.10+dfsg-3ubuntu0.16.04.3
Ubuntu 14.04 LTS
    libvncserver0 - 0.9.9+dfsg-1ubuntu1.4

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

After a standard system update you need to restart LibVNCServer applications to
make all the necessary changes.

References

    CVE-2018-15126
    CVE-2018-15127
    CVE-2018-20019
    CVE-2018-20020
    CVE-2018-20021
    CVE-2018-20022
    CVE-2018-20023
    CVE-2018-20024
    CVE-2018-20748
    CVE-2018-20749
    CVE-2018-20750
    CVE-2018-6307

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