ESB-2018.3720.2 - UPDATE [Ubuntu] ghostscript: Multiple vulnerabilities 2018-12-07

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

                              ESB-2018.3720.2
                        Ghostscript vulnerabilities
                              7 December 2018

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

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

Product:           ghostscript
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Access Privileged Data          -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-19477 CVE-2018-19476 CVE-2018-19475
                   CVE-2018-19409  

Reference:         ESB-2018.3701
                   ESB-2018.3688

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3831-1
   http://www.ubuntu.com/usn/usn-3831-2

Comment: This bulletin contains two (2) Ubuntu security advisories.

Revision History:  December  7 2018: Added USN-3831-2 featuring a regression fix
                   November 30 2018: Initial Release

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==========================================================================
Ubuntu Security Notice USN-3831-1
November 29, 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:

It was discovered that Ghostscript contained multiple security issues. 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                     9.26~dfsg+0-0ubuntu0.18.10.1
  libgs9                          9.26~dfsg+0-0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
  ghostscript                     9.26~dfsg+0-0ubuntu0.18.04.1
  libgs9                          9.26~dfsg+0-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  ghostscript                     9.26~dfsg+0-0ubuntu0.16.04.1
  libgs9                          9.26~dfsg+0-0ubuntu0.16.04.1

Ubuntu 14.04 LTS:
  ghostscript                     9.26~dfsg+0-0ubuntu0.14.04.1
  libgs9                          9.26~dfsg+0-0ubuntu0.14.04.1

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References:
  https://usn.ubuntu.com/usn/usn-3831-1
  CVE-2018-19409, CVE-2018-19475, CVE-2018-19476, CVE-2018-19477

Package Information:
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.10.1
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.04.1
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.16.04.1
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.14.04.1

- --------------------------------------------------------------------------------

==========================================================================
Ubuntu Security Notice USN-3831-2
December 06, 2018

ghostscript regression
==========================================================================

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:

USN-3831-1 introduced a regression in Ghostscript.

Software Description:
- - ghostscript: PostScript and PDF interpreter

Details:

USN-3831-1 fixed vulnerabilities in Ghostscript. Ghostscript 9.26
introduced a regression when used with certain options. This update fixes
the problem.

Original advisory details:

 It was discovered that Ghostscript contained multiple security issues. 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                     9.26~dfsg+0-0ubuntu0.18.10.3
  libgs9                          9.26~dfsg+0-0ubuntu0.18.10.3

Ubuntu 18.04 LTS:
  ghostscript                     9.26~dfsg+0-0ubuntu0.18.04.3
  libgs9                          9.26~dfsg+0-0ubuntu0.18.04.3

Ubuntu 16.04 LTS:
  ghostscript                     9.26~dfsg+0-0ubuntu0.16.04.3
  libgs9                          9.26~dfsg+0-0ubuntu0.16.04.3

Ubuntu 14.04 LTS:
  ghostscript                     9.26~dfsg+0-0ubuntu0.14.04.3
  libgs9                          9.26~dfsg+0-0ubuntu0.14.04.3

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

References:
  https://usn.ubuntu.com/usn/usn-3831-2
  https://usn.ubuntu.com/usn/usn-3831-1
  https://launchpad.net/bugs/1806517

Package Information:
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.10.3
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.18.04.3
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.16.04.3
  https://launchpad.net/ubuntu/+source/ghostscript/9.26~dfsg+0-0ubuntu0.14.04.3

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