Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : ImageMagick vulnerabilities (USN-3785-1)

critical Nessus Plugin ID 117935


The remote Ubuntu host is missing one or more security updates.


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.

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.

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.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

See Also


Plugin Details

Severity: Critical

ID: 117935

File Name: ubuntu_USN-3785-1.nasl

Version: 1.7

Type: local

Agent: unix

Published: 10/5/2018

Updated: 10/21/2023

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2018-14551


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:imagemagick, p-cpe:/a:canonical:ubuntu_linux:imagemagick-6-common, p-cpe:/a:canonical:ubuntu_linux:imagemagick-6.q16, p-cpe:/a:canonical:ubuntu_linux:imagemagick-6.q16hdri, p-cpe:/a:canonical:ubuntu_linux:imagemagick-common, p-cpe:/a:canonical:ubuntu_linux:libimage-magick-perl, p-cpe:/a:canonical:ubuntu_linux:libimage-magick-q16-perl, p-cpe:/a:canonical:ubuntu_linux:libimage-magick-q16hdri-perl, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6-headers, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16-5v5, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16-7, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16-dev, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16hdri-7, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16hdri-dev, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-dev, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b5, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6-arch-config, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6-headers, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-2, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-2-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-3, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-3-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-dev, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16hdri-3, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16hdri-3-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16hdri-dev, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-dev, p-cpe:/a:canonical:ubuntu_linux:libmagickcore5, p-cpe:/a:canonical:ubuntu_linux:libmagickcore5-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6-headers, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16-2, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16-3, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16-dev, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16hdri-3, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16hdri-dev, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-dev, p-cpe:/a:canonical:ubuntu_linux:libmagickwand5, p-cpe:/a:canonical:ubuntu_linux:perlmagick, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/4/2018

Vulnerability Publication Date: 8/23/2017

Reference Information

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

USN: 3785-1