Login
Newsletter
Werbung

Sicherheit: Mehrere Probleme in Linux
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in Linux
ID: USN-3740-1
Distribution: Ubuntu
Plattformen: Ubuntu 18.04 LTS
Datum: Mi, 15. August 2018, 07:36
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
Applikationen: Linux

Originalnachricht


--===============1895444010880761961==
Content-Type: multipart/signed; micalg=pgp-sha512;
protocol="application/pgp-signature";
boundary="aF3LVLvitz/VQU3c"
Content-Disposition: inline


--aF3LVLvitz/VQU3c
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

==========================================================================
Ubuntu Security Notice USN-3740-1
August 14, 2018

linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oem, and
linux-raspi2 vulnerabilities
==========================================================================

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

- Ubuntu 18.04 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-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oem: Linux kernel for OEM processors
- linux-raspi2: Linux kernel for Raspberry Pi 2

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 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 18.04 LTS:
linux-image-4.15.0-1015-oem 4.15.0.1015.17
linux-image-4.15.0-1017-gcp 4.15.0-1017.18
linux-image-4.15.0-1019-aws 4.15.0-1019.19
linux-image-4.15.0-1019-kvm 4.15.0-1019.19
linux-image-4.15.0-1020-raspi2 4.15.0-1020.22
linux-image-4.15.0-1021-azure 4.15.0.1021.21
linux-image-4.15.0-32-generic 4.15.0-32.35
linux-image-4.15.0-32-generic-lpae 4.15.0-32.35
linux-image-4.15.0-32-lowlatency 4.15.0-32.35
linux-image-4.15.0-32-snapdragon 4.15.0-32.35
linux-image-aws 4.15.0.1019.19
linux-image-azure 4.15.0.1021.21
linux-image-azure-edge 4.15.0.1021.21
linux-image-gcp 4.15.0.1017.19
linux-image-generic 4.15.0.32.34
linux-image-generic-lpae 4.15.0.32.34
linux-image-gke 4.15.0.1017.19
linux-image-kvm 4.15.0.1019.19
linux-image-lowlatency 4.15.0.32.34
linux-image-oem 4.15.0.1015.17
linux-image-raspi2 4.15.0.1020.18
linux-image-snapdragon 4.15.0.32.34

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-3740-1
CVE-2018-3620, CVE-2018-3646, CVE-2018-5391,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/L1TF

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-32.35
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1019.19
https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1021.21
https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1017.18
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1019.19
https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1015.18
https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1020.22


--aF3LVLvitz/VQU3c
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
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=Z9vz
-----END PGP SIGNATURE-----

--aF3LVLvitz/VQU3c--


--===============1895444010880761961==
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