Debian: DSA-4143-1 Moderate: Firefox-ESR Critical Memory Risk

Richard Zhu and Huzaifa Sidhpurwala discovered that an out-of-bounds
memory write when playing Vorbis media files could result in the
execution of arbitrary code.

For the oldstable distribution (jessie), these problems have been fixed
in version 52.7.2esr-1~deb8u1.

For the stable distribution (stretch), these problems have been fixed in
version 52.7.2esr-1~deb9u1.

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/source-package/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/