Updated firefox-esr packages has been released for Debian GNU/Linux 9 and 10 to address multiple security issues

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Debian Security Advisory DSA-4580-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
December 09, 2019 https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2019-17005 CVE-2019-17008 CVE-2019-17010
CVE-2019-17011 CVE-2019-17012

Multiple security issues have been found in the Mozilla Firefox web
browser, which could potentially result in the execution of arbitrary
code.

For the oldstable distribution (stretch), these problems have been fixed
in version 68.3.0esr-1~deb9u1.

For the stable distribution (buster), these problems have been fixed in
version 68.3.0esr-1~deb10u1.

We recommend that you upgrade your firefox-esr packages.

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

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/