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CVE-2017-18211: Imagemagick: NULL Pointer Dereference

CVE-2017-18211 is rated critical with a CVSS v3.0 base score of 9.8 and affects Imagemagick, along with 1 other product in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

In ImageMagick 7.0.7, a NULL pointer dereference vulnerability was found in the function saveBinaryCLProgram in magick/opencl.c because a program-lookup result is not checked, related to CacheOpenCLKernel.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-476: NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

Affected products

  • Imagemagick: 7.0.7-0; 7.0.7-1; 7.0.7-2; 7.0.7-3; 7.0.7-4; 7.0.7-5; 7.0.7-6; 7.0.7-8; 7.0.7-9; 7.0.7-10; 7.0.7-11; 7.0.7-12
  • Canonical Ubuntu Linux: 14.04; 16.04; 17.10; 18.04

References