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redhatRedHatRHSA-2019:1455
HistoryJun 11, 2019 - 1:19 p.m.

(RHSA-2019:1455) Important: Advanced Virtualization security update

2019-06-1113:19:11
access.redhat.com
75

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

0.004 Low

EPSS

Percentile

71.7%

The Advanced Virtualization module provides the user-space component
for running virtual machines that use KVM in environments managed by Red
Hat products.

Security Fix(es):

  • A flaw was found in the implementation of the “fill buffer”, a mechanism used by modern CPUs when a cache-miss is made on L1 CPU cache. If an attacker can generate a load operation that would create a page fault, the execution will continue speculatively with incorrect data from the fill buffer while the data is fetched from higher level caches. This response time can be measured to infer data in the fill buffer. (CVE-2018-12130)

  • Modern Intel microprocessors implement hardware-level micro-optimizations to improve the performance of writing data back to CPU caches. The write operation is split into STA (STore Address) and STD (STore Data) sub-operations. These sub-operations allow the processor to hand-off address generation logic into these sub-operations for optimized writes. Both of these sub-operations write to a shared distributed processor structure called the ‘processor store buffer’. As a result, an unprivileged attacker could use this flaw to read private data resident within the CPU’s processor store buffer. (CVE-2018-12126)

  • Microprocessors use a ‘load port’ subcomponent to perform load operations from memory or IO. During a load operation, the load port receives data from the memory or IO subsystem and then provides the data to the CPU registers and operations in the CPU’s pipelines. Stale load operations results are stored in the ‘load port’ table until overwritten by newer operations. Certain load-port operations triggered by an attacker can be used to reveal data about previous stale requests leaking data back to the attacker via a timing side-channel. (CVE-2018-12127)

  • Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. (CVE-2019-11091)

  • libvirt: wrong permissions in systemd admin-sock due to missing SocketMode parameter (CVE-2019-10132)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

OSVersionArchitecturePackageVersionFilename
RedHatanyx86_64libguestfs-winsupport< 8.0-2.module+el8.0.0+3273+6bc1ee54libguestfs-winsupport-8.0-2.module+el8.0.0+3273+6bc1ee54.x86_64.rpm
RedHatanyx86_64libvirt-daemon-driver-interface< 5.0.0-7.1.module+el8.0.0+3273+6bc1ee54libvirt-daemon-driver-interface-5.0.0-7.1.module+el8.0.0+3273+6bc1ee54.x86_64.rpm
RedHatanys390xlibvirt-dbus< 1.3.0-1.module+el8.0.0+3273+6bc1ee54libvirt-dbus-1.3.0-1.module+el8.0.0+3273+6bc1ee54.s390x.rpm
RedHatanyppc64lelibguestfs-devel< 1.40.2-1.module+el8.0.0+3273+6bc1ee54libguestfs-devel-1.40.2-1.module+el8.0.0+3273+6bc1ee54.ppc64le.rpm
RedHatanyaarch64libvirt-daemon-driver-storage-gluster< 5.0.0-7.1.module+el8.0.0+3273+6bc1ee54libvirt-daemon-driver-storage-gluster-5.0.0-7.1.module+el8.0.0+3273+6bc1ee54.aarch64.rpm
RedHatanys390xlibiscsi-utils< 1.18.0-6.module+el8.0.0+3273+6bc1ee54libiscsi-utils-1.18.0-6.module+el8.0.0+3273+6bc1ee54.s390x.rpm
RedHatanyx86_64libvirt-daemon-driver-storage< 5.0.0-7.1.module+el8.0.0+3273+6bc1ee54libvirt-daemon-driver-storage-5.0.0-7.1.module+el8.0.0+3273+6bc1ee54.x86_64.rpm
RedHatanyaarch64qemu-guest-agent< 3.1.0-20.module+el8.0.0+3273+6bc1ee54.1qemu-guest-agent-3.1.0-20.module+el8.0.0+3273+6bc1ee54.1.aarch64.rpm
RedHatanys390xlibguestfs-rsync< 1.40.2-1.module+el8.0.0+3273+6bc1ee54libguestfs-rsync-1.40.2-1.module+el8.0.0+3273+6bc1ee54.s390x.rpm
RedHatanyx86_64libguestfs-gobject-debuginfo< 1.40.2-1.module+el8.0.0+3273+6bc1ee54libguestfs-gobject-debuginfo-1.40.2-1.module+el8.0.0+3273+6bc1ee54.x86_64.rpm
Rows per page:
1-10 of 6281

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

0.004 Low

EPSS

Percentile

71.7%

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