In ImageMagick before 6.9.9-0 and 7.x before 7.0.6-1, the ReadOneMNGImage function in coders/png.c has an out-of-bounds read with the MNG CLIP chunk.
http://www.securityfocus.com/bid/100494
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870109
https://github.com/ImageMagick/ImageMagick/commit/d072ed6aff835c174e856ce3a428163c0da9e8f4
https://security.gentoo.org/glsa/201711-07
https://usn.ubuntu.com/3681-1/
Source: MITRE
Published: 2017-08-23
Updated: 2020-10-14
Type: CWE-125
Base Score: 7.5
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 10
Severity: HIGH
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL