[USN-3272-2] Ghostscript regression

[Steve Beattie]

==========================================================================
Ubuntu Security Notice USN-3272-2
May 16, 2017

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

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

- Ubuntu 17.04
- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

USN-3272-1 introduced a regression in Ghostscript.

Software Description:
- ghostscript: PostScript and PDF interpreter

Details:

USN-3272-1 fixed vulnerabilities in Ghostscript. This change introduced
a regression when the DELAYBIND feature is used with the eqproc
command. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that Ghostscript improperly handled parameters to
 the rsdparams and eqproc commands. An attacker could use these to
 craft a malicious document that could disable -dSAFER protections,
 thereby allowing the execution of arbitrary code, or cause a denial
 of service (application crash). (CVE-2017-8291)

 Kamil Frankowicz discovered a use-after-free vulnerability in the
 color management module of Ghostscript. An attacker could use this
 to cause a denial of service (application crash). (CVE-2016-10217)

 Kamil Frankowicz discovered a divide-by-zero error in the scan
 conversion code in Ghostscript. An attacker could use this to cause
 a denial of service (application crash). (CVE-2016-10219)

 Kamil Frankowicz discovered multiple NULL pointer dereference errors in
 Ghostscript. An attacker could use these to cause a denial of service
 (application crash). (CVE-2016-10220, CVE-2017-5951, CVE-2017-7207)

Update instructions:

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

Ubuntu 17.04:
  ghostscript                     9.19~dfsg+1-0ubuntu7.4
  ghostscript-x                   9.19~dfsg+1-0ubuntu7.4
  libgs9                          9.19~dfsg+1-0ubuntu7.4
  libgs9-common                   9.19~dfsg+1-0ubuntu7.4

Ubuntu 16.10:
  ghostscript                     9.19~dfsg+1-0ubuntu6.6
  ghostscript-x                   9.19~dfsg+1-0ubuntu6.6
  libgs9                          9.19~dfsg+1-0ubuntu6.6
  libgs9-common                   9.19~dfsg+1-0ubuntu6.6

Ubuntu 16.04 LTS:
  ghostscript                     9.18~dfsg~0-0ubuntu2.6
  ghostscript-x                   9.18~dfsg~0-0ubuntu2.6
  libgs9                          9.18~dfsg~0-0ubuntu2.6
  libgs9-common                   9.18~dfsg~0-0ubuntu2.6

Ubuntu 14.04 LTS:
  ghostscript                     9.10~dfsg-0ubuntu10.9
  ghostscript-x                   9.10~dfsg-0ubuntu10.9
  libgs9                          9.10~dfsg-0ubuntu10.9
  libgs9-common                   9.10~dfsg-0ubuntu10.9

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

References:
  http://www.ubuntu.com/usn/usn-3272-2
  http://www.ubuntu.com/usn/usn-3272-1
  https://launchpad.net/bugs/1687614

Package Information:
  https://launchpad.net/ubuntu/+source/ghostscript/9.19~dfsg+1-0ubuntu7.4
  https://launchpad.net/ubuntu/+source/ghostscript/9.19~dfsg+1-0ubuntu6.6
  https://launchpad.net/ubuntu/+source/ghostscript/9.18~dfsg~0-0ubuntu2.6
  https://launchpad.net/ubuntu/+source/ghostscript/9.10~dfsg-0ubuntu10.9

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