Versions mentioned in the description apply to the upstream
Remediation section below for
Debian:9 relevant versions.
WritePALMImage() in /coders/palm.c used size_t casts in several areas of a calculation which could lead to values outside the range of representable type
unsigned long undefined behavior when a crafted input file was processed by ImageMagick. The patch casts to
ssize_t instead to avoid this issue. Red Hat Product Security marked the Severity as Low because although it could potentially lead to an impact to application availability, no specific impact was shown in this case. This flaw affects ImageMagick versions prior to ImageMagick 7.0.9-0.
imagemagick to version 8:22.214.171.124+dfsg-11+deb9u12 or higher.