ESB-2018.3396 - [Ubuntu] ghostscript: Execute arbitrary code/commands - Remote/unauthenticated 2018-10-31

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3396
    Multiple Ghostscript vulnerabilities have been identified in Ubuntu
                              31 October 2018

===========================================================================

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

Product:           ghostscript
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-18284 CVE-2018-18073 CVE-2018-17961

Reference:         ESB-2018.3218

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3803-1

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==========================================================================
Ubuntu Security Notice USN-3803-1
October 30, 2018

ghostscript 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 Ghostscript.

Software Description:
- - ghostscript: PostScript and PDF interpreter

Details:

Tavis Ormandy discovered multiple security issues in Ghostscript. If a user
or automated system were tricked into processing a specially crafted file,
a remote attacker could possibly use these issues to access arbitrary
files, execute arbitrary code, or cause a denial of service.

Update instructions:

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

Ubuntu 18.10:
  ghostscript                     9.25~dfsg+1-0ubuntu1.1
  libgs9                          9.25~dfsg+1-0ubuntu1.1

Ubuntu 18.04 LTS:
  ghostscript                     9.25~dfsg+1-0ubuntu0.18.04.2
  libgs9                          9.25~dfsg+1-0ubuntu0.18.04.2

Ubuntu 16.04 LTS:
  ghostscript                     9.25~dfsg+1-0ubuntu0.16.04.2
  libgs9                          9.25~dfsg+1-0ubuntu0.16.04.2

Ubuntu 14.04 LTS:
  ghostscript                     9.25~dfsg+1-0ubuntu0.14.04.2
  libgs9                          9.25~dfsg+1-0ubuntu0.14.04.2

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

References:
  https://usn.ubuntu.com/usn/usn-3803-1
  CVE-2018-17961, CVE-2018-18073, CVE-2018-18284

Package Information:
  https://launchpad.net/ubuntu/+source/ghostscript/9.25~dfsg+1-0ubuntu1.1
  https://launchpad.net/ubuntu/+source/ghostscript/9.25~dfsg+1-0ubuntu0.18.04.2
  https://launchpad.net/ubuntu/+source/ghostscript/9.25~dfsg+1-0ubuntu0.16.04.2
  https://launchpad.net/ubuntu/+source/ghostscript/9.25~dfsg+1-0ubuntu0.14.04.2

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