[SECURITY] [DLA 896-1] icedove/thunderbird security update

Package : icedove
Version : 1:45.8.0-3~deb7u1
CVE ID : CVE-2017-5373 CVE-2017-5375 CVE-2017-5376 CVE-2017-5378
CVE-2017-5380 CVE-2017-5383 CVE-2017-5390 CVE-2017-5396
CVE-2017-5398 CVE-2017-5400 CVE-2017-5401 CVE-2017-5402
CVE-2017-5404 CVE-2017-5405 CVE-2017-5407 CVE-2017-5408
CVE-2017-5410

Multiple security issues have been found in the Mozilla Thunderbird mail
client: Multiple memory safety errors, buffer overflows and other
implementation errors may lead to the execution of arbitrary code or spoofing.

With version 45.8 Debian drops it's custom branding from the Icedove package
and ships the mail client as Thunderbird again. Please see the link below for
further information:
https://wiki.debian.org/Thunderbird

Transition packages for the Icedove packages are provided which
automatically upgrade to the new version. Since new binary packages need
to be installed, make sure to allow that in your upgrade procedure (e.g.
by using "apt-get dist-upgrade" instead of "apt-get upgrade").

For Debian 7 "Wheezy", these problems have been fixed in version
1:45.8.0-3~deb7u1.

We recommend that you upgrade your icedove packages.

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