In GraphicsMagick 1.3.27a, there is a heap-based buffer over-read in ReadOneJNGImage in coders/png.c, related to oFFs chunk allocation.
https://www.debian.org/security/2018/dsa-4321
https://lists.debian.org/debian-lts-announce/2018/06/msg00009.html
https://lists.debian.org/debian-lts-announce/2018/01/msg00005.html
https://usn.ubuntu.com/4248-1/
https://sourceforge.net/p/graphicsmagick/bugs/530/
http://hg.graphicsmagick.org/hg/GraphicsMagick?cmd=changeset%3Bnode=8e3d2264109c
Source: Mitre, NVD
Published: 2017-12-20
Updated: 2025-04-20
Base Score: 6.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00695