In Artifex Ghostscript 9.23 before 2018-08-24, a type confusion using the .shfill operator could be used by attackers able to supply crafted PostScript files to crash the interpreter or potentially execute code.
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=0b6cd1918e1ec4ffd087400a754a845180a4522b
http://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=e01e77a36cbb2e0277bc3a63852244bec41be0f6
http://www.securityfocus.com/bid/105178
https://access.redhat.com/errata/RHSA-2018:3650
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101
https://lists.debian.org/debian-lts-announce/2018/09/msg00015.html
https://security.gentoo.org/glsa/201811-12
https://support.f5.com/csp/article/K24803507?utm_source=f5support&utm_medium=RSS
Source: MITRE
Published: 2018-08-27
Updated: 2019-10-16
Type: CWE-704
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1.8
Severity: HIGH