Out-of-bounds Read Affecting imagemagick package, versions <8:6.8.9.9-7ubuntu5.16+esm2


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.08% (36th percentile)

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  • Snyk IDSNYK-UBUNTU1604-IMAGEMAGICK-1136899
  • published11 Jun 2021
  • disclosed8 Dec 2020

Introduced: 8 Dec 2020

CVE-2020-25674  (opens in a new tab)
CWE-125  (opens in a new tab)
CWE-122  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade Ubuntu:16.04 imagemagick to version 8:6.8.9.9-7ubuntu5.16+esm2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream imagemagick package and not the imagemagick package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

WriteOnePNGImage() from coders/png.c (the PNG coder) has a for loop with an improper exit condition that can allow an out-of-bounds READ via heap-buffer-overflow. This occurs because it is possible for the colormap to have less than 256 valid values but the loop condition will loop 256 times, attempting to pass invalid colormap data to the event logger. The patch replaces the hardcoded 256 value with a call to MagickMin() to ensure the proper value is used. This could impact application availability when a specially crafted input file is processed by ImageMagick. This flaw affects ImageMagick versions prior to 7.0.8-68.

CVSS Scores

version 3.1