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A flaw was found in all versions of ghostscript 9.x before 9.28,
where the `.charkeys` procedure, where it did not properly secure
its privileged calls, enabling scripts to bypass `-dSAFER` restrictions.
An attacker could abuse this flaw by creating a specially crafted
PostScript file that could escalate privileges within the Ghostscript
and access files outside of restricted areas or execute commands.
References:
https://nvd.nist.gov/vuln/detail/CVE-2019-14869
Upstream patches:
https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=485904
Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
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Stefan Ghinea