Artifex Ghostscript is vulnerable to authorization bypass attacks. This exists in the psi/zdevice2.c
file. which allows remote attackers to bypass intended access restrictions because available stack space is not checked when the device remains the same.
git.ghostscript.com/?p=ghostpdl.git;a=commit;h=3005fcb9bb160af199e761e03bc70a9f249a987e
git.ghostscript.com/?p=ghostpdl.git;a=commit;h=aeea342904978c9fe17d85f4906a0f6fcce2d315
www.securityfocus.com/bid/106154
access.redhat.com/errata/RHBA-2019:0327
access.redhat.com/errata/RHSA-2019:0229
access.redhat.com/security/updates/classification/#important
bugs.ghostscript.com/show_bug.cgi?id=700153
bugzilla.redhat.com/show_bug.cgi?id=1665919
lists.debian.org/debian-lts-announce/2018/11/msg00036.html
semmle.com/news/semmle-discovers-severe-vulnerability-ghostscript-postscript-pdf
usn.ubuntu.com/3831-1/
www.debian.org/security/2018/dsa-4346
www.ghostscript.com/doc/9.26/History9.htm#Version9.26