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==========================================================================
Ubuntu Security Notice USN-3403-1
August 28, 2017

ghostscript vulnerabilities
==========================================================================

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

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Ghostscript.

Software Description:
- ghostscript: PostScript and PDF interpreter

Details:

Kamil Frankowicz discovered that Ghostscript mishandles references.
A remote attacker could use this to cause a denial of service.
(CVE-2017-11714)

Kim Gwan Yeong discovered that Ghostscript could allow a heap-based
buffer over-read and application crash. A remote attacker could use a
crafted document to cause a denial of service. (CVE-2017-9611, 
CVE-2017-9726, CVE-2017-9727, CVE-2017-9739)

Kim Gwan Yeong discovered an use-after-free vulnerability in
Ghostscript. A remote attacker could use a crafted file to cause a
denial of service. (CVE-2017-9612)

Kim Gwan Yeong discovered a lack of integer overflow check in
Ghostscript. A remote attacker could use crafted PostScript document to
cause a denial of service. (CVE-2017-9835)

Update instructions:

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

Ubuntu 17.04:
  ghostscript                     9.19~dfsg+1-0ubuntu7.6
  ghostscript-x                   9.19~dfsg+1-0ubuntu7.6
  libgs9                          9.19~dfsg+1-0ubuntu7.6
  libgs9-common                   9.19~dfsg+1-0ubuntu7.6

Ubuntu 16.04 LTS:
  ghostscript                     9.18~dfsg~0-0ubuntu2.7
  ghostscript-x                   9.18~dfsg~0-0ubuntu2.7
  libgs9                          9.18~dfsg~0-0ubuntu2.7
  libgs9-common                   9.18~dfsg~0-0ubuntu2.7

Ubuntu 14.04 LTS:
  ghostscript                     9.10~dfsg-0ubuntu10.10
  ghostscript-x                   9.10~dfsg-0ubuntu10.10
  libgs9                          9.10~dfsg-0ubuntu10.10
  libgs9-common                   9.10~dfsg-0ubuntu10.10

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

References:
  https://www.ubuntu.com/usn/usn-3403-1
  CVE-2017-11714, CVE-2017-9611, CVE-2017-9612, CVE-2017-9726,
  CVE-2017-9727, CVE-2017-9739, CVE-2017-9835

Package Information:
  https://launchpad.net/ubuntu/+source/ghostscript/9.19~dfsg+1-0ubuntu7.6
  https://launchpad.net/ubuntu/+source/ghostscript/9.18~dfsg~0-0ubuntu2.7
  https://launchpad.net/ubuntu/+source/ghostscript/9.10~dfsg-0ubuntu10.10