A firefox-esr security update has been released for Debian GNU/Linux 10 to address multiple security issues which could potentially result in the execution of arbitrary code or an information leak.

DSA 4736-1: firefox-esr security update

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Debian Security Advisory DSA-4736-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
July 29, 2020   https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2020-6463 CVE-2020-6514 CVE-2020-15652 CVE-2020-15659

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

For the stable distribution (buster), these problems have been fixed in
version 68.11.0esr-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/