Login
Newsletter
Werbung

Sicherheit: Mehrere Probleme in Linux
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in Linux
ID: USN-3741-1
Distribution: Ubuntu
Plattformen: Ubuntu 16.04 LTS
Datum: Mi, 15. August 2018, 07:38
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3646
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3620
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5391
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5390
Applikationen: Linux

Originalnachricht


--===============9116187038024416139==
Content-Type: multipart/signed; micalg=pgp-sha512;
protocol="application/pgp-signature";
boundary="fU0UwhtRbpo05rnG"
Content-Disposition: inline


--fU0UwhtRbpo05rnG
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

==========================================================================
Ubuntu Security Notice USN-3741-1
August 14, 2018

linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-kvm: Linux kernel for cloud environments
- linux-raspi2: Linux kernel for Raspberry Pi 2
- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

It was discovered that memory present in the L1 data cache of an Intel CPU
core may be exposed to a malicious process that is executing on the CPU
core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local
attacker in a guest virtual machine could use this to expose sensitive
information (memory from other guests or the host OS). (CVE-2018-3646)

It was discovered that memory present in the L1 data cache of an Intel CPU
core may be exposed to a malicious process that is executing on the CPU
core. This vulnerability is also known as L1 Terminal Fault (L1TF). A local
attacker could use this to expose sensitive information (memory from the
kernel or other processes). (CVE-2018-3620)

Juha-Matti Tilli discovered that the TCP implementation in the Linux kernel
performed algorithmically expensive operations in some situations when
handling incoming packets. A remote attacker could use this to cause a
denial of service. (CVE-2018-5390)

Juha-Matti Tilli discovered that the IP implementation in the Linux kernel
performed algorithmically expensive operations in some situations when
handling incoming packet fragments. A remote attacker could use this to
cause a denial of service. (CVE-2018-5391)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
linux-image-4.4.0-1031-kvm 4.4.0-1031.37
linux-image-4.4.0-1065-aws 4.4.0-1065.75
linux-image-4.4.0-1094-raspi2 4.4.0-1094.102
linux-image-4.4.0-1098-snapdragon 4.4.0-1098.103
linux-image-4.4.0-133-generic 4.4.0-133.159
linux-image-4.4.0-133-generic-lpae 4.4.0-133.159
linux-image-4.4.0-133-lowlatency 4.4.0-133.159
linux-image-4.4.0-133-powerpc-e500mc 4.4.0-133.159
linux-image-4.4.0-133-powerpc-smp 4.4.0-133.159
linux-image-4.4.0-133-powerpc64-emb 4.4.0-133.159
linux-image-4.4.0-133-powerpc64-smp 4.4.0-133.159
linux-image-aws 4.4.0.1065.67
linux-image-generic 4.4.0.133.139
linux-image-generic-lpae 4.4.0.133.139
linux-image-kvm 4.4.0.1031.30
linux-image-lowlatency 4.4.0.133.139
linux-image-powerpc-e500mc 4.4.0.133.139
linux-image-powerpc-smp 4.4.0.133.139
linux-image-powerpc64-emb 4.4.0.133.139
linux-image-powerpc64-smp 4.4.0.133.139
linux-image-raspi2 4.4.0.1094.94
linux-image-snapdragon 4.4.0.1098.90

Please note that the recommended mitigation for CVE-2018-3646 involves
updating processor microcode in addition to updating the kernel;
however, the kernel includes a fallback for processors that have not
received microcode updates.

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
https://usn.ubuntu.com/usn/usn-3741-1
CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/L1TF

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-133.159
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1065.75
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1031.37
https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1094.102
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1098.103


--fU0UwhtRbpo05rnG
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----

iQIzBAABCgAdFiEEpgY7tWAjCaQ8jrvULwmejQBegfQFAltzWGMACgkQLwmejQBe
gfSN0w/8CPcbT/o9cC0pj86yFO+qglRfjQORKUMCtRTOiyM9kIqwiPwBGvuTt58h
Dze5l8gD1rqoR6cUNSWvor176LTqIb0hZXPK+GitVtIks9PzUCajuVErnWyi9pK+
MGlu9SxIoMCND/sYHEn9xw70vl7Omq+xqRnlx6AYxV7rVhneA89w666qQL94drjb
vWNRbH4y5GgBNDDc0AEeUXNSc5Tf7aXaduKKvJd+IJxnTdkqtPwa6FMzwIaKjjOi
h0V51D0VLy8tKDTa18Hl1v+goAvPTsj8yalRORe5Q94TUfcsqUvLtgORKTed/LFl
SbqOdWPgL3GZ2fL9L1TD6ojOTk4Hh/O07+MYy1h2TnhL0npklH7QWFNBtaHajSfu
J4fm7p08rwKcHzzm63F3bD1XUTLhLbC9ZTDsrY4oPJtby0w2MC1GXzFPRFuwxDF7
wS18LAi9tcKp/deblm6wulq7O8v6nKM1gcIQ0MaSPzS7onvHiCQZlS7vLmqbIXfi
kfoK0QiN7wTv72hzZMILZ3xx20oe7HsxzocTKko6e1zzCQmJDDAX6sCEp96dBYSn
hiPzNforczM8fGvkLHTre7TShVyyR0ENwgTLHw4Aw8vLwuDzojNaMsuaGMGtSAxf
cMgt0f+a4phjovBb0ZCedmz6cztQ3mxCN43O79Zw7GWD/QmQzeE=
=FJRZ
-----END PGP SIGNATURE-----

--fU0UwhtRbpo05rnG--


--===============9116187038024416139==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

--
ubuntu-security-announce mailing list
ubuntu-security-announce@lists.ubuntu.com
Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce
Pro-Linux
Traut euch!
Neue Nachrichten
Werbung