Out-of-bounds Read Affecting imagemagick package, versions <8:6.9.7.4+dfsg-11+deb9u11
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Test your applications- Snyk ID SNYK-DEBIAN9-IMAGEMAGICK-1045663
- published 26 Nov 2020
- disclosed 8 Dec 2020
How to fix?
Upgrade Debian:9
imagemagick
to version 8:6.9.7.4+dfsg-11+deb9u11 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 Debian
.
See How to fix?
for Debian:9
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.