--===============7457767544650033998==
Content-Type: multipart/signed; micalg=pgp-sha512;
protocol="application/pgp-signature";
boundary="lx6+J6gHrzwEpYNy"
Content-Disposition: inline
--lx6+J6gHrzwEpYNy
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inlin
Content-Transfer-Encoding: quoted-printable
==========================================================================
Ubuntu Security Notice USN-3981-2
May 15, 2019
linux-hwe, linux-azure, linux-gcp, linux-oracle vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel
- linux-oracle: Linux kernel for Oracle Cloud systems
Details:
USN-3981-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu
16.04 LTS and for the Linux Azure kernel for Ubuntu 14.04 LTS.
Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan
Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa
Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos,
Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss
discovered that memory previously stored in microarchitectural fill buffers
of an Intel CPU core may be exposed to a malicious process that is
executing on the same CPU core. A local attacker could use this to expose
sensitive information. (CVE-2018-12130)
Brandon Falk, Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Stephan
van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh
Razavi, Herbert Bos, and Cristiano Giuffrida discovered that memory
previously stored in microarchitectural load ports of an Intel CPU core may
be exposed to a malicious process that is executing on the same CPU core. A
local attacker could use this to expose sensitive information.
(CVE-2018-12127)
Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Marina Minkin, Daniel
Moghimi, Moritz Lipp, Michael Schwarz, Jo Van Bulck, Daniel Genkin, Daniel
Gruss, Berk Sunar, Frank Piessens, and Yuval Yarom discovered that memory
previously stored in microarchitectural store buffers of an Intel CPU core
may be exposed to a malicious process that is executing on the same CPU
core. A local attacker could use this to expose sensitive information.
(CVE-2018-12126)
Vasily Averin and Evgenii Shatokhin discovered that a use-after-free
vulnerability existed in the NFS41+ subsystem when multiple network
namespaces are in use. A local attacker in a container could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2018-16884)
Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Volodrmyr Pikhur,
Moritz Lipp, Michael Schwarz, Daniel Gruss, Stephan van Schaik, Alyssa
Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and
Cristiano Giuffrida discovered that uncacheable memory previously stored in
microarchitectural buffers of an Intel CPU core may be exposed to a
malicious process that is executing on the same CPU core. A local attacker
could use this to expose sensitive information. (CVE-2019-11091)
Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups
subsystem of the Linux kernel did not properly account for SCTP socket
buffers. A local attacker could use this to cause a denial of service
(system crash). (CVE-2019-3874)
Alex Williamson discovered that the vfio subsystem of the Linux kernel did
not properly limit DMA mappings. A local attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-3882)
Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel contained a heap buffer overflow. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-9500)
Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux
kernel did not properly prevent remote firmware events from being processed
for USB Wifi devices. A physically proximate attacker could use this to
send firmware events to the device. (CVE-2019-9503)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
linux-image-4.15.0-1013-oracle 4.15.0-1013.15~16.04.1
linux-image-4.15.0-1032-gcp 4.15.0-1032.34~16.04.1
linux-image-4.15.0-1045-azure 4.15.0-1045.49
linux-image-4.15.0-50-generic 4.15.0-50.54~16.04.1
linux-image-4.15.0-50-generic-lpae 4.15.0-50.54~16.04.1
linux-image-4.15.0-50-lowlatency 4.15.0-50.54~16.04.1
linux-image-azure 4.15.0.1045.49
linux-image-gcp 4.15.0.1032.46
linux-image-generic-hwe-16.04 4.15.0.50.71
linux-image-generic-lpae-hwe-16.04 4.15.0.50.71
linux-image-gke 4.15.0.1032.46
linux-image-lowlatency-hwe-16.04 4.15.0.50.71
linux-image-oem 4.15.0.50.71
linux-image-oracle 4.15.0.1013.7
linux-image-virtual-hwe-16.04 4.15.0.50.71
Ubuntu 14.04 ESM:
linux-image-4.15.0-1045-azure 4.15.0-1045.49~14.04.1
linux-image-azure 4.15.0.1045.32
After a standard system update you need to reboot your computer to make
all the necessary changes.
Please note that fully mitigating the Microarchitectural Data Sampling
(MDS) issues (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, and
CVE-2019-11091) requires corresponding processor microcode/firmware
updates or, in virtual environments, hypervisor updates.
References:
https://usn.ubuntu.com/usn/usn-3981-2
https://usn.ubuntu.com/usn/usn-3981-1
CVE-2018-12126, CVE-2018-12127, CVE-2018-12130,
CVE-2018-16884, CVE-2019-11091, CVE-2019-3874,
CVE-2019-3882, CVE-2019-9500, CVE-2019-9503,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/MDS
Package Information:
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1045.49
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1032.34~16.04.1
https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-50.54~16.04.1
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1013.15~16.04.1
--lx6+J6gHrzwEpYNy
Content-Type: application/pgp-signature; name="signature.asc"
-----BEGIN PGP SIGNATURE-----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=sJP0
-----END PGP SIGNATURE-----
--lx6+J6gHrzwEpYNy--
--===============7457767544650033998==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline
LS0gCnVidW50dS1zZWN1cml0eS1hbm5vdW5jZSBtYWlsaW5nIGxpc3QKdWJ1bnR1LXNlY3VyaXR5
LWFubm91bmNlQGxpc3RzLnVidW50dS5jb20KTW9kaWZ5IHNldHRpbmdzIG9yIHVuc3Vic2NyaWJl
IGF0OiBodHRwczovL2xpc3RzLnVidW50dS5jb20vbWFpbG1hbi9saXN0aW5mby91YnVudHUtc2Vj
dXJpdHktYW5ub3VuY2UK
--===============7457767544650033998==--
|
