The following updates has been released for Debian GNU/Linux 9:

DSA 4368-1: zeromq3 security update
DSA 4369-1: xen security update

DSA 4368-1: zeromq3 security update

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Debian Security Advisory DSA-4368-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
January 14, 2019 https://www.debian.org/security/faq
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Package : zeromq3
CVE ID : CVE-2019-6250

Guido Vranken discovered that an incorrect bounds check in ZeroMQ, a
lightweight messaging kernel, could result in the execution of arbitrary
code.

For the stable distribution (stretch), this problem has been fixed in
version 4.2.1-4+deb9u1.

We recommend that you upgrade your zeromq3 packages.

For the detailed security status of zeromq3 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/zeromq3

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 4369-1: xen security update

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Debian Security Advisory DSA-4369-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
January 14, 2019 https://www.debian.org/security/faq
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Package : xen
CVE ID : CVE-2018-19961 CVE-2018-19962 CVE-2018-19965
CVE-2018-19966 CVE-2018-19967

Multiple vulnerabilities have been discovered in the Xen hypervisor:

CVE-2018-19961 / CVE-2018-19962

Paul Durrant discovered that incorrect TLB handling could result in
denial of service, privilege escalation or information leaks.

CVE-2018-19965

Matthew Daley discovered that incorrect handling of the INVPCID
instruction could result in denial of service by PV guests.

CVE-2018-19966

It was discovered that a regression in the fix to address
CVE-2017-15595 could result in denial of service, privilege
escalation or information leaks by a PV guest.

CVE-2018-19967

It was discovered that an error in some Intel CPUs could result in
denial of service by a guest instance.

For the stable distribution (stretch), these problems have been fixed in
version 4.8.5+shim4.10.2+xsa282-1+deb9u11.

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/