Ubuntu alert USN-4111-1 (ghostscript)

From:
             
 
Steve Beattie <steve.beattie@canonical.com> 
To:
             
 
ubuntu-security-announce@lists.ubuntu.com 
Subject:
             
 
[USN-4111-1] Ghostscript vulnerabilities 
Date:
             
 
Wed, 28 Aug 2019 18:44:32 -0700
Message-ID:
             
 
<20190829014432.GC26016@nxnw.org>
==========================================================================
Ubuntu Security Notice USN-4111-1
August 29, 2019

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

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

- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Ghostscript could be made to access arbitrary files if it opened a
specially crafted file.

Software Description:
- ghostscript: PostScript and PDF interpreter

Details:

Hiroki Matsukuma discovered that the PDF interpreter in Ghostscript
did not properly restrict privileged calls when ‘-dSAFER’
restrictions were in effect. If a user or automated system were
tricked into processing a specially crafted file, a remote attacker
could possibly use this issue to access arbitrary files.
(CVE-2019-14811, CVE-2019-14812, CVE-2019-14813, CVE-2019-14817)

Update instructions:

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

Ubuntu 19.04:
  ghostscript                     9.26~dfsg+0-0ubuntu7.3
  libgs9                          9.26~dfsg+0-0ubuntu7.3

Ubuntu 18.04 LTS:
  ghostscript                     9.26~dfsg+0-0ubuntu0.18.04.11
  libgs9                          9.26~dfsg+0-0ubuntu0.18.04.11

Ubuntu 16.04 LTS:
  ghostscript                     9.26~dfsg+0-0ubuntu0.16.04.11
  libgs9                          9.26~dfsg+0-0ubuntu0.16.04.11

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

References:
  https://usn.ubuntu.com/4111-1
  CVE-2019-14811, CVE-2019-14812, CVE-2019-14813, CVE-2019-14817

Package Information:
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfs...
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfs...
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfs...

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