Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2019.0129
xen security update
15 January 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: xen
Publisher: Debian
Operating System: Debian GNU/Linux 9
Impact/Access: Root Compromise -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-19967 CVE-2018-19966 CVE-2018-19965
CVE-2018-19962 CVE-2018-19961 CVE-2017-15595
Reference: ESB-2019.0045
ESB-2019.0030
ESB-2018.3624.2
Original Bulletin:
http://www.debian.org/security/2019/dsa-4369
- --------------------------BEGIN INCLUDED TEXT--------------------
- - -------------------------------------------------------------------------
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
- - -------------------------------------------------------------------------
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/
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=NCx9
-----END PGP SIGNATURE-----