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Gentoo Linux Security Advisory                           GLSA 202006-06
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: ssvnc: Multiple vulnerabilities
     Date: June 13, 2020
     Bugs: #701820
       ID: 202006-06

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Synopsis
========

Multiple vulnerabilities have been found in ssvnc, the worst of which
could result in the arbitrary execution of code.

Background
==========

The Enhanced TightVNC Viewer, SSVNC, adds encryption security to VNC
connections.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-misc/ssvnc             <= 1.0.29-r2               Vulnerable!
    -------------------------------------------------------------------
     NOTE: Certain packages are still vulnerable. Users should migrate
           to another package if one is available or wait for the
           existing packages to be marked stable by their
           architecture maintainers.

Description
===========

Multiple vulnerabilities have been discovered in ssvnc. Please review
the CVE identifiers referenced below for details.

Impact
======

Please review the referenced CVE identifiers for details.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

Gentoo has discontinued support for ssvnc. We recommend that users
unmerge ssvnc:

  # emerge --unmerge "net-misc/ssvnc"

NOTE: The Gentoo developer(s) maintaining ssvnc have discontinued
support at this time. It may be possible that a new Gentoo developer
will update ssvnc at a later date. An alternative may be a manual SSH
tunnel.

References
==========

[ 1 ] CVE-2018-20020
      https://nvd.nist.gov/vuln/detail/CVE-2018-20020
[ 2 ] CVE-2018-20021
      https://nvd.nist.gov/vuln/detail/CVE-2018-20021
[ 3 ] CVE-2018-20022
      https://nvd.nist.gov/vuln/detail/CVE-2018-20022
[ 4 ] CVE-2018-20024
      https://nvd.nist.gov/vuln/detail/CVE-2018-20024

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202006-06

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

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