Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2018.3036
linux security update
9 October 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: linux kernel
Publisher: Debian
Operating System: Debian GNU/Linux 9
Impact/Access: Increased Privileges -- Existing Account
Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-18021 CVE-2018-15471
Reference: ESB-2018.2940
ESB-2018.2698
Original Bulletin:
http://www.debian.org/security/2018/dsa-4313
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
- - -------------------------------------------------------------------------
Debian Security Advisory DSA-4313-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
October 08, 2018 https://www.debian.org/security/faq
- - -------------------------------------------------------------------------
Package : linux
CVE ID : CVE-2018-15471 CVE-2018-18021
Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.
CVE-2018-15471 (XSA-270)
Felix Wilhelm of Google Project Zero discovered a flaw in the hash
handling of the xen-netback Linux kernel module. A malicious or
buggy frontend may cause the (usually privileged) backend to make
out of bounds memory accesses, potentially resulting in privilege
escalation, denial of service, or information leaks.
https://xenbits.xen.org/xsa/advisory-270.html
CVE-2018-18021
It was discovered that the KVM subsystem on the arm64 platform does
not properly handle the KVM_SET_ON_REG ioctl. An attacker who can
create KVM based virtual machines can take advantage of this flaw
for denial of service (hypervisor panic) or privilege escalation
(arbitrarily redirect the hypervisor flow of control with full
register control).
For the stable distribution (stretch), these problems have been fixed in
version 4.9.110-3+deb9u6.
We recommend that you upgrade your linux packages.
For the detailed security status of linux please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/linux
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/
Mailing list: debian-security-announce@lists.debian.org
- -----BEGIN PGP SIGNATURE-----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=RKUP
- -----END PGP SIGNATURE-----
- --------------------------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
iQIVAwUBW7vl5GaOgq3Tt24GAQiglRAAszFGSwCIz1Vcmpcw51/8JeIJwWKfr7kO
AYvVM56DynczB/eRqY7Nps16KcZBhg4ymnb95CiYkaNO/nRnASyz0KWtVB9S/JyI
6cYXYjDywUPbQ4EqJQGpzjRH2gCHAeALw0imRl7IZYsjgPxS1FuaepSVjR5ZBMPg
AJ5lES51RWVgXL8Jsd0JRuqq15AkxidkzxdkmcPKl4EHGtNm+rCmQVUwp9i61FkH
Pq4s8zaLGfOlGN5ggkPO3CCdsFDB+ogrYEq+c8v0AA70r3Nw0Lwi5WggJyzj2DpF
Mez2YMPskS7HumJzuK7Zp0LfVTG6HdI47oRkULjchxb1Rsmnds9Q3p7w9SMAGRo2
mFmkbPr2T5TBVC9Z50EKQCYwtkSv980yjrFibv4YXM++z+R/lZDrmEGe/hqzpQMZ
gSs/46vy4VuEf5CSk30KVA4PihKZlhU8XmLohspwauynAC2k8RJFQFj8Fesqu0Ge
AJMx3KreU+HF69ZtRjQFglfA/Di+clWNnpaBPkBpcBpF5fieCOxSknNNOBqYW0kB
VHTE2ntCgkGmi5JBW/YuJXDtCV5jo/DjrhzX5vtYrnfpfVUcZPM3x416F4Sjpu/q
QggXGxSt4v2Fs3HiE6zQcm6kRH7DOr8JuPvScreYME8GA+Tc8Lye7T5ZyaFe0Ruh
vFtwYOhmuBs=
=1G5U
-----END PGP SIGNATURE-----