Debian DSA-4294-1: Ghostscript Arbitrary Code Execution Risk

Tavis Ormandy discovered multiple vulnerabilites in Ghostscript, an
interpreter for the PostScript language, which could result in the
execution of arbitrary code if a malformed Postscript file is processed
(despite the dSAFER sandbox being enabled).

For the stable distribution (stretch), these problems have been fixed in
version 9.20~dfsg-3.2+deb9u5.

We recommend that you upgrade your ghostscript packages.

For the detailed security status of ghostscript please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/ghostscript

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/