ESB-2018.3015 - [Ubuntu] ImageMagick: Multiple vulnerabilities 2018-10-05

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3015
                        ImageMagick vulnerabilities
                              5 October 2018

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

Product:           ImageMagick
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Access Confidential Data        -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-16750 CVE-2018-16749 CVE-2018-16645
                   CVE-2018-16644 CVE-2018-16643 CVE-2018-16642
                   CVE-2018-16640 CVE-2018-16323 CVE-2018-14551
                   CVE-2018-14437 CVE-2018-14436 CVE-2018-14435
                   CVE-2018-14434 CVE-2017-13144 

Reference:         ESB-2018.2505
                   ESB-2018.2490
                   ESB-2018.2845

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3785-1

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USN-3785-1: ImageMagick vulnerabilities

4 October 2018

imagemagick vulnerabilities

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

  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS

Summary

Several security issues were fixed in ImageMagick.

Software Description

  o imagemagick - Image manipulation programs and library

Details

Due to a large number of issues discovered in GhostScript that prevent it from
being used by ImageMagick safely, this update includes a default policy change
that disables support for the Postscript and PDF formats in ImageMagick. This
policy can be overridden if necessary by using an alternate ImageMagick policy
configuration.

It was discovered that several memory leaks existed when handling certain
images in ImageMagick. An attacker could use this to cause a denial of service.
(CVE-2018-14434, CVE-2018-14435, CVE-2018-14436, CVE-2018-14437,
CVE-2018-16640, CVE-2018-16750)

It was discovered that ImageMagick did not properly initialize a variable
before using it when processing MAT images. An attacker could use this to cause
a denial of service or possibly execute arbitrary code. This issue only
affected Ubuntu 18.04 LTS. (CVE-2018-14551)

It was discovered that an information disclosure vulnerability existed in
ImageMagick when processing XBM images. An attacker could use this to expose
sensitive information. (CVE-2018-16323)

It was discovered that an out-of-bounds write vulnerability existed in
ImageMagick when handling certain images. An attacker could use this to cause a
denial of service or possibly execute arbitrary code. (CVE-2018-16642)

It was discovered that ImageMagick did not properly check for errors in some
situations. An attacker could use this to cause a denial of service.
(CVE-2018-16643)

It was discovered that ImageMagick did not properly validate image meta data in
some situations. An attacker could use this to cause a denial of service.
(CVE-2018-16644)

It was discovered that ImageMagick did not prevent excessive memory allocation
when handling certain image types. An attacker could use this to cause a denial
of service. (CVE-2018-16645)

Sergej Schumilo and Cornelius Aschermann discovered that ImageMagick did not
properly check for NULL in some situations when processing PNG images. An
attacker could use this to cause a denial of service. (CVE-2018-16749)

USN-3681-1 fixed vulnerabilities in Imagemagick. Unfortunately, the fix for
CVE-2017-13144 introduced a regression in ImageMagick in Ubuntu 14.04 LTS and
Ubuntu 16.04 LTS. This update reverts the fix for CVE-2017-13144 for those
releases.

We apologize for the inconvenience.

Update instructions

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

Ubuntu 18.04 LTS
    imagemagick - 8:6.9.7.4+dfsg-16ubuntu6.4
    imagemagick-6.q16 - 8:6.9.7.4+dfsg-16ubuntu6.4
    libmagick++-6.q16-7 - 8:6.9.7.4+dfsg-16ubuntu6.4
    libmagickcore-6.q16-3 - 8:6.9.7.4+dfsg-16ubuntu6.4
    libmagickcore-6.q16-3-extra - 8:6.9.7.4+dfsg-16ubuntu6.4
Ubuntu 16.04 LTS
    imagemagick - 8:6.8.9.9-7ubuntu5.13
    imagemagick-6.q16 - 8:6.8.9.9-7ubuntu5.13
    libmagick++-6.q16-5v5 - 8:6.8.9.9-7ubuntu5.13
    libmagickcore-6.q16-2 - 8:6.8.9.9-7ubuntu5.13
    libmagickcore-6.q16-2-extra - 8:6.8.9.9-7ubuntu5.13
Ubuntu 14.04 LTS
    imagemagick - 8:6.7.7.10-6ubuntu3.13
    libmagick++5 - 8:6.7.7.10-6ubuntu3.13
    libmagickcore5 - 8:6.7.7.10-6ubuntu3.13
    libmagickcore5-extra - 8:6.7.7.10-6ubuntu3.13

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades.

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

References

  o CVE-2018-14434
  o CVE-2018-14435
  o CVE-2018-14436
  o CVE-2018-14437
  o CVE-2018-14551
  o CVE-2018-16323
  o CVE-2018-16640
  o CVE-2018-16642
  o CVE-2018-16643
  o CVE-2018-16644
  o CVE-2018-16645
  o CVE-2018-16749
  o CVE-2018-16750
  o LP: 1793485

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