Updated Thunderbird packages has been released for both Debian GNU/Linux 8 and 9

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Debian Security Advisory DSA-3968-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
September 11, 2017 https://www.debian.org/security/faq
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Package : icedove
CVE ID : CVE-2017-7753 CVE-2017-7779 CVE-2017-7784 CVE-2017-7785
CVE-2017-7786 CVE-2017-7787 CVE-2017-7791 CVE-2017-7792
CVE-2017-7800 CVE-2017-7801 CVE-2017-7802 CVE-2017-7803
CVE-2017-7807 CVE-2017-7809

Multiple security issues have been found in Thunderbird, which may lead
to the execution of arbitrary code or denial of service.

For the oldstable distribution (jessie), these problems have been fixed
in version 52.3.0-4~deb8u2.

For the stable distribution (stretch), these problems have been fixed in
version 52.3.0-4~deb9u1.

We recommend that you upgrade your icedove 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/

  icedove/thunderbird security update for Debian 8/9