[USN-4573-1] Vino vulnerabilities

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-4573-1
October 07, 2020

vino vulnerabilities
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Vino.

Software Description:
- vino: VNC server for GNOME

Details:

Nicolas Ruff discovered that Vino incorrectly handled large ClientCutText
messages. A remote attacker could use this issue to cause the server to
crash, resulting in a denial of service. (CVE-2014-6053)

It was discovered that Vino incorrectly handled certain packet lengths. A
remote attacker could possibly use this issue to obtain sensitive
information, cause a denial of service, or execute arbitrary code.
(CVE-2018-7225)

Pavel Cheremushkin discovered that an information disclosure vulnerability
existed in Vino when sending a ServerCutText message. An attacker could
possibly use this issue to expose sensitive information. (CVE-2019-15681)

It was discovered that Vino incorrectly handled region clipping. A remote
attacker could possibly use this issue to cause Vino to crash, resulting in
a denial of service. (CVE-2020-14397)

It was discovered that Vino incorrectly handled encodings. A remote
attacker could use this issue to cause Vino to crash, resulting in a denial
of service, or possibly execute arbitrary code. (CVE-2020-14402,
CVE-2020-14403, CVE-2020-14404)

Update instructions:

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

Ubuntu 20.04 LTS:
  vino                            3.22.0-5ubuntu2.1

Ubuntu 18.04 LTS:
  vino                            3.22.0-3ubuntu1.1

Ubuntu 16.04 LTS:
  vino                            3.8.1-0ubuntu9.3

After a standard system update you need to restart your session to make all
the necessary changes.

References:
  https://usn.ubuntu.com/4573-1
  CVE-2014-6053, CVE-2018-7225, CVE-2019-15681, CVE-2020-14397,
  CVE-2020-14402, CVE-2020-14403, CVE-2020-14404

Package Information:
  https://launchpad.net/ubuntu/+source/vino/3.22.0-5ubuntu2.1
  https://launchpad.net/ubuntu/+source/vino/3.22.0-3ubuntu1.1
  https://launchpad.net/ubuntu/+source/vino/3.8.1-0ubuntu9.3

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