[MacPorts] #55289: libextractor @1.4: update to 1.7

[MacPorts]

#55289: libextractor @1.4: update to 1.7
---------------------------+------------------------
  Reporter:  l2dy          |      Owner:  ryandesign
      Type:  update        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:  security
      Port:  libextractor  |
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Description changed by l2dy:

Old description:

> CVE-2017-15922, see https://lists.gnu.org/archive/html/bug-
> libextractor/2017-10/msg00008.html.
> [https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17440
> CVE-2017-17440]

New description:

 [https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17440
 CVE-2017-17440], CVE-2018-14346, CVE-2018-14347, CVE-2017-15922

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Ticket URL: <https://trac.macports.org/ticket/55289#comment:2>
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