The following updates has been released for Debian GNU/Linux:

Debian GNU/Linux 8 and 9:
DSA 4209-1: thunderbird security update

Debian GNU/Linux 9:
DSA 4210-1: xen security update

DSA 4209-1: thunderbird security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4209-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
May 25, 2018 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : thunderbird
CVE ID : CVE-2018-5150 CVE-2018-5154 CVE-2018-5155 CVE-2018-5159
CVE-2018-5161 CVE-2018-5162 CVE-2018-5168 CVE-2018-5170
CVE-2018-5178 CVE-2018-5183 CVE-2018-5184 CVE-2018-5185

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

For the oldstable distribution (jessie), these problems have been fixed
in version 1:52.8.0-1~deb8u1.

For the stable distribution (stretch), these problems have been fixed in
version 1:52.8.0-1~deb9u1.

We recommend that you upgrade your thunderbird packages.

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

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/

DSA 4210-1: xen security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4210-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
May 25, 2018 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : xen
CVE ID : CVE-2018-3639

This update provides mitigations for the Spectre v4 variant in x86-based
micro processors. On Intel CPUs this requires updated microcode which
is currently not released publicly (but your hardware vendor may have
issued an update). For servers with AMD CPUs no microcode update is
needed, please refer to https://xenbits.xen.org/xsa/advisory-263.html
for further information.

For the stable distribution (stretch), this problem has been fixed in
version 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u7.

We recommend that you upgrade your xen packages.

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

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/