Логотип exploitDog
Консоль
Логотип exploitDog

exploitDog

suse-cvrf логотип

SUSE-SU-2021:1648-1

Опубликовано: 19 мая 2021
Источник: suse-cvrf

Описание

Security update for xen

This update for xen fixes the following issues:

Security issue fixed:

  • CVE-2021-28689: Fixed some x86 speculative vulnerabilities with bare (non-shim) 32-bit PV guests (XSA-370) (bsc#1185104)

  • Make sure xencommons is in a format as expected by fillup. (bsc#1185682)

    Each comment needs to be followed by an enabled key. Otherwise fillup will remove manually enabled key=value pairs, along with everything that looks like a stale comment, during next pkg update

  • A recent systemd update caused a regression in xenstored.service systemd now fails to track units that use systemd-notify (bsc#1183790)

  • Added a delay between the call to systemd-notify and the final exit of the wrapper script (bsc#1185021, bsc#1185196)

Список пакетов

Image SLES12-SP4-EC2-HVM-BYOS
xen-libs-4.11.4_18-2.54.1
xen-tools-domU-4.11.4_18-2.54.1
Image SLES12-SP4-SAP-EC2-HVM
xen-libs-4.11.4_18-2.54.1
xen-tools-domU-4.11.4_18-2.54.1
Image SLES12-SP4-SAP-EC2-HVM-BYOS
xen-libs-4.11.4_18-2.54.1
xen-tools-domU-4.11.4_18-2.54.1
SUSE Linux Enterprise Server 12 SP4-LTSS
xen-4.11.4_18-2.54.1
xen-doc-html-4.11.4_18-2.54.1
xen-libs-4.11.4_18-2.54.1
xen-libs-32bit-4.11.4_18-2.54.1
xen-tools-4.11.4_18-2.54.1
xen-tools-domU-4.11.4_18-2.54.1
SUSE Linux Enterprise Server for SAP Applications 12 SP4
xen-4.11.4_18-2.54.1
xen-doc-html-4.11.4_18-2.54.1
xen-libs-4.11.4_18-2.54.1
xen-libs-32bit-4.11.4_18-2.54.1
xen-tools-4.11.4_18-2.54.1
xen-tools-domU-4.11.4_18-2.54.1
SUSE OpenStack Cloud 9
xen-4.11.4_18-2.54.1
xen-doc-html-4.11.4_18-2.54.1
xen-libs-4.11.4_18-2.54.1
xen-libs-32bit-4.11.4_18-2.54.1
xen-tools-4.11.4_18-2.54.1
xen-tools-domU-4.11.4_18-2.54.1
SUSE OpenStack Cloud Crowbar 9
xen-4.11.4_18-2.54.1
xen-doc-html-4.11.4_18-2.54.1
xen-libs-4.11.4_18-2.54.1
xen-libs-32bit-4.11.4_18-2.54.1
xen-tools-4.11.4_18-2.54.1
xen-tools-domU-4.11.4_18-2.54.1

Ссылки

Описание

x86: Speculative vulnerabilities with bare (non-shim) 32-bit PV guests 32-bit x86 PV guest kernels run in ring 1. At the time when Xen was developed, this area of the i386 architecture was rarely used, which is why Xen was able to use it to implement paravirtualisation, Xen's novel approach to virtualization. In AMD64, Xen had to use a different implementation approach, so Xen does not use ring 1 to support 64-bit guests. With the focus now being on 64-bit systems, and the availability of explicit hardware support for virtualization, fixing speculation issues in ring 1 is not a priority for processor companies. Indirect Branch Restricted Speculation (IBRS) is an architectural x86 extension put together to combat speculative execution sidechannel attacks, including Spectre v2. It was retrofitted in microcode to existing CPUs. For more details on Spectre v2, see: http://xenbits.xen.org/xsa/advisory-254.html However, IBRS does not architecturally protect ring 0 from predictions learnt in ring 1. For more details, see: https://software.intel.com/security-software-guidance/deep-dives/deep-dive-indirect-branch-restricted-speculation Similar situations may exist with other mitigations for other kinds of speculative execution attacks. The situation is quite likely to be similar for speculative execution attacks which have yet to be discovered, disclosed, or mitigated.

Затронутые продукты
Image SLES12-SP4-EC2-HVM-BYOS:xen-libs-4.11.4_18-2.54.1
Image SLES12-SP4-EC2-HVM-BYOS:xen-tools-domU-4.11.4_18-2.54.1
Image SLES12-SP4-SAP-EC2-HVM-BYOS:xen-libs-4.11.4_18-2.54.1
Image SLES12-SP4-SAP-EC2-HVM-BYOS:xen-tools-domU-4.11.4_18-2.54.1
Ссылки