ghostscript vulnerabilities

[Alex Vong <alexvong1995@gmail.com>]

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Hello,

Below are from the security announcement list:

Salvatore Bonaccorso <carnil@debian.org> writes:

> -------------------------------------------------------------------------
> Debian Security Advisory DSA-3691-1                   security@debian.org
> https://www.debian.org/security/                     Salvatore Bonaccorso
> October 12, 2016                      https://www.debian.org/security/faq
> -------------------------------------------------------------------------
>
> Package        : ghostscript
> CVE ID         : CVE-2013-5653 CVE-2016-7976 CVE-2016-7977 CVE-2016-7978 
>                  CVE-2016-7979 CVE-2016-8602
> Debian Bug     : 839118 839260 839841 839845 839846 840451
>
> Several vulnerabilities were discovered in Ghostscript, the GPL
> PostScript/PDF interpreter, which may lead to the execution of arbitrary
> code or information disclosure if a specially crafted Postscript file is
> processed.
>
> For the stable distribution (jessie), these problems have been fixed in
> version 9.06~dfsg-2+deb8u3.
>
> We recommend that you upgrade your ghostscript packages.
>
> 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/
>
> Mailing list: debian-security-announce@lists.debian.org

I've checked just now. GNU Ghostscript is also affected at least by
CVE-2016-8602. Looking at the patch in this bug report[0] and the
source[1], one can see that the vulnerable lines are present in GNU
Ghostscript. What should we do now?

[0]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=840451
[1]: http://git.savannah.gnu.org/cgit/ghostscript.git/tree/psi/zht2.c

Thanks,
Alex

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