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Vulnerability of Intel Processors: information disclosure via Special Register Buffer Data Sampling

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via Special Register Buffer Data Sampling of Intel Processors, in order to obtain sensitive information.
Vulnerable systems: XenServer, Debian, Fedora, HP ProLiant, Linux, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Xen.
Severity of this threat: 1/4.
Creation date: 09/06/2020.
Références of this weakness: CERTFR-2020-AVI-351, CERTFR-2020-AVI-352, CERTFR-2020-AVI-353, CERTFR-2020-AVI-356, CERTFR-2020-AVI-368, CERTFR-2020-AVI-376, CTX275165, CVE-2020-0543, DLA-2241-1, DLA-2241-2, DLA-2242-1, DLA-2248-1, DSA-4698-1, DSA-4699-1, DSA-4701-1, FEDORA-2020-11ddbfbdf0, FEDORA-2020-3364913ace, FEDORA-2020-e47d28bc2b, FEDORA-2020-e49a911382, FEDORA-2020-e8835a5f8e, HPESBHF04001, INTEL-SA-00320, openSUSE-SU-2020:0791-1, openSUSE-SU-2020:0801-1, openSUSE-SU-2020:0818-1, RHSA-2020:2431-01, RHSA-2020:2432-01, RHSA-2020:2433-01, RHSA-2020:2677-01, RHSA-2020:2679-01, RHSA-2020:2680-01, RHSA-2020:2706-01, RHSA-2020:2707-01, RHSA-2020:2757-01, RHSA-2020:2758-01, RHSA-2020:2771-01, SSA:2020-163-01, SUSE-SU-2020:14393-1, SUSE-SU-2020:14394-1, SUSE-SU-2020:1599-1, SUSE-SU-2020:1630-1, SUSE-SU-2020:1632-1, SUSE-SU-2020:1633-1, SUSE-SU-2020:1634-1, SUSE-SU-2020:1663-1, USN-4385-1, USN-4385-2, USN-4387-1, USN-4388-1, USN-4389-1, USN-4390-1, USN-4391-1, USN-4392-1, USN-4393-1, VIGILANCE-VUL-32486, XSA-320.

Description of the vulnerability 

An attacker can bypass access restrictions to data via Special Register Buffer Data Sampling of Intel Processors, in order to obtain sensitive information.
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This computer weakness impacts software or systems such as XenServer, Debian, Fedora, HP ProLiant, Linux, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Xen.

Our Vigil@nce team determined that the severity of this vulnerability note is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this cybersecurity threat.

Solutions for this threat 

Linux kernel: version 5.7.2.
The version 5.7.2 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.6.18.
The version 5.6.18 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.46.
The version 5.4.46 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.128.
The version 4.19.128 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.184.
The version 4.14.184 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.227.
The version 4.9.227 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.227.
The version 4.4.227 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 3.16.85.
The version 3.16.85 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v3.x/

Linux kernel: patch for Intel SRBDS.
A patch is indicated in information sources.

Citrix XenServer/Hypervisor: patch for Special Register Buffer Data Sampling.
A patch is available:
  Citrix Hypervisor 8.1: CTX272278 - https://support.citrix.com/article/CTX272278
  Citrix Hypervisor 8.0: CTX272277 - https://support.citrix.com/article/CTX272277
  Citrix XenServer 7.1 LTSR CU2: CTX272276 - https://support.citrix.com/article/CTX272276
  Citrix XenServer 7.0: CTX272275 - https://support.citrix.com/article/CTX272275

Debian 10: new linux packages.
New packages are available:
  Debian 10: linux 4.19.118-2+deb10u1

Debian 8: new intel-microcode packages.
New packages are available:
  Debian 8: intel-microcode 3.20200609.2~deb8u1

Debian 8: new linux-4.9 packages.
New packages are available:
  Debian 8: linux-4.9 4.9.210-1+deb9u1~deb8u1

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.84-1

Debian 9-10: new intel-microcode packages.
New packages are available:
  Debian 9: intel-microcode 3.20200609.2~deb9u1
  Debian 10: intel-microcode 3.20200609.2~deb10u1

Debian 9: new linux packages.
New packages are available:
  Debian 9: linux 4.9.210-1+deb9u1

Fedora 31: new kernel-headers packages.
New packages are available:
  Fedora 31: kernel-headers 5.6.18-200.fc31

Fedora 31: new kernel packages.
New packages are available:
  Fedora 31: kernel 5.6.18-200.fc31

Fedora 31: new microcode_ctl packages.
New packages are available:
  Fedora 31: microcode_ctl 2.1-39.fc31

Fedora 31: new xen packages.
New packages are available:
  Fedora 31: xen 4.12.3-2.fc31

Fedora 32: new kernel-headers packages.
New packages are available:
  Fedora 32: kernel-headers 5.6.18-300.fc32

Fedora 32: new kernel packages.
New packages are available:
  Fedora 32: kernel 5.6.18-300.fc32

Fedora 32: new microcode_ctl packages.
New packages are available:
  Fedora 32: microcode_ctl 2.1-39.fc32

HPE ProLiant: fixed versions for Intel Processors.
Fixed versions are indicated in information sources.

openSUSE Leap 15.1: new kernel packages.
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.52.1

openSUSE Leap 15.1: new ucode-intel packages.
New packages are available:
  openSUSE Leap 15.1: ucode-intel 20200602-lp151.2.24.1

openSUSE Leap 15.1: new xen packages.
New packages are available:
  openSUSE Leap 15.1: xen 4.12.3_02-lp151.2.18.2

RHEL 6.10: new microcode_ctl packages.
New packages are available:
  RHEL 6.10: microcode_ctl 1.17-33.26.el6_10

RHEL 6.5: new microcode_ctl packages.
New packages are available:
  RHEL 6.5: microcode_ctl 1.17-17.31.el6_5

RHEL 6.6: new microcode_ctl packages.
New packages are available:
  RHEL 6.6: microcode_ctl 1.17-19.29.el6_6

RHEL 7.2: new microcode_ctl packages.
New packages are available:
  RHEL 7.2: microcode_ctl 2.1-12.30.el7_2

RHEL 7.3: new microcode_ctl packages.
New packages are available:
  RHEL 7.3: microcode_ctl 2.1-16.33.el7_3

RHEL 7.4: new microcode_ctl packages.
New packages are available:
  RHEL 7.4: microcode_ctl 2.1-22.32.el7_4

RHEL 7.7: new microcode_ctl packages.
New packages are available:
  RHEL 7.7: microcode_ctl 2.1-53.9.el7_7

RHEL 7.8: new microcode_ctl packages.
New packages are available:
  RHEL 7.8: microcode_ctl 2.1-61.6.el7_8

RHEL 8.0: new microcode_ctl packages.
New packages are available:
  RHEL 8.0: microcode_ctl 20180807a-2.20200609.1.el8_0

RHEL 8.1: new microcode_ctl packages.
New packages are available:
  RHEL 8.1: microcode_ctl 20190618-1.20200609.1.el8_1

RHEL 8.2: new microcode_ctl packages.
New packages are available:
  RHEL 8.2: microcode_ctl 20191115-4.20200602.2.el8_2

Slackware 14.2: new kernel packages.
New packages are available:
  Slackware 14.2: kernel 4.4.227-i586-1

SUSE LE 11 SP3/4: new microcode_ctl packages.
New packages are available:
  SUSE LE 11 SP4: microcode_ctl 1.17-102.83.53.1
  SUSE LE 11 SP3: microcode_ctl 1.17-102.83.53.1

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.114.1

SUSE LE 12 SP3: new xen packages (17/06/2020).
New packages are available:
  SUSE LE 12 SP3: xen 4.9.4_06-3.62.1

SUSE LE 12 SP4: new xen packages.
New packages are available:
  SUSE LE 12 SP4: xen 4.11.4_02-2.26.1

SUSE LE 12 SP5: new xen packages.
New packages are available:
  SUSE LE 12 SP5: xen 4.12.3_02-3.14.1

SUSE LE 15: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.52.1

SUSE LE 15 RTM: new xen packages.
New packages are available:
  SUSE LE 15 RTM: xen 4.10.4_10-3.31.1

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.45.1

Ubuntu 12.04: new linux-image-3.2.0 packages.
New packages are available:
  Ubuntu 12.04 ESM: linux-image-generic 3.2.0.147.161

Ubuntu 18.04: new linux-gke-5.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gke-5.0 5.0.0.1042.27

Ubuntu 20.04: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 20.04 LTS: linux-image-generic 5.4.0.37.40

Ubuntu: new intel-microcode packages.
New packages are available:
  Ubuntu 20.04 LTS: intel-microcode 3.20200609.0ubuntu0.20.04.2
  Ubuntu 19.10: intel-microcode 3.20200609.0ubuntu0.19.10.2
  Ubuntu 18.04 LTS: intel-microcode 3.20200609.0ubuntu0.18.04.1
  Ubuntu 16.04 LTS: intel-microcode 3.20200609.0ubuntu0.16.04.1
  Ubuntu 14.04 ESM: intel-microcode 3.20200609.0ubuntu0.14.04.1

Ubuntu: new linux-image-3.13.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-generic 3.13.0.180.189
  Ubuntu 12.04 ESM: linux-image-generic-lts-trusty 3.13.0.180.166

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.106.94
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.106.111

Ubuntu: new linux-image-4.4.0 packages.
New packages are available:
  Ubuntu 16.04 LTS: linux-image-generic 4.4.0.184.190
  Ubuntu 14.04 ESM: linux-image-generic-lts-xenial 4.4.0.184.161

Ubuntu: new linux-image-5.3.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.3.0.59.113
  Ubuntu 19.10: linux-image-generic 5.3.0.59.49

Wind River Linux: patch for Special Register Buffer Data Sampling.
A patch is indicated in information sources.

Xen: patch for Special Register Buffer Data Sampling.
A patch is available:
  https://xenbits.xen.org/xsa/xsa320/xsa320-1.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-2.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.9-1.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.9-2.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.10-1.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.10-2.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.11-1.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.11-2.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.12-1.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.12-2.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.13-1.patch
  https://xenbits.xen.org/xsa/xsa320/xsa320-4.13-2.patch
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