openSUSE Security Update : qemu (openSUSE-2019-426) (Spectre)

Medium Nessus Plugin ID 123186

Synopsis

The remote openSUSE host is missing a security update.

Description

This update for qemu fixes the following issues :

This security issue was fixed :

- CVE-2018-3639: Spectre v4 vulnerability mitigation support for KVM guests (bsc#1092885).

Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.

This patch permits the new x86 cpu feature flag named 'ssbd' to be presented to the guest, given that the host has this feature, and KVM exposes it to the guest as well.

For this feature to be enabled please use the qemu commandline

-cpu $MODEL,+spec-ctrl,+ssbd so the guest OS can take advantage of the feature.

spec-ctrl and ssbd support is also required in the host.

This non-security issue was fixed :

- Fix qemu-guest-agent uninstall (boo#1093169)

Solution

Update the affected qemu packages.

See Also

https://bugzilla.opensuse.org/show_bug.cgi?id=1092885

https://bugzilla.opensuse.org/show_bug.cgi?id=1093169

Plugin Details

Severity: Medium

ID: 123186

File Name: openSUSE-2019-426.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2019/03/27

Updated: 2019/04/02

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.9

Temporal Score: 3.8

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:N

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 5.5

Temporal Score: 5

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:opensuse:qemu, p-cpe:/a:novell:opensuse:qemu-arm, p-cpe:/a:novell:opensuse:qemu-arm-debuginfo, p-cpe:/a:novell:opensuse:qemu-block-curl, p-cpe:/a:novell:opensuse:qemu-block-curl-debuginfo, p-cpe:/a:novell:opensuse:qemu-block-dmg, p-cpe:/a:novell:opensuse:qemu-block-dmg-debuginfo, p-cpe:/a:novell:opensuse:qemu-block-gluster, p-cpe:/a:novell:opensuse:qemu-block-gluster-debuginfo, p-cpe:/a:novell:opensuse:qemu-block-iscsi, p-cpe:/a:novell:opensuse:qemu-block-iscsi-debuginfo, p-cpe:/a:novell:opensuse:qemu-block-rbd, p-cpe:/a:novell:opensuse:qemu-block-rbd-debuginfo, p-cpe:/a:novell:opensuse:qemu-block-ssh, p-cpe:/a:novell:opensuse:qemu-block-ssh-debuginfo, p-cpe:/a:novell:opensuse:qemu-debuginfo, p-cpe:/a:novell:opensuse:qemu-debugsource, p-cpe:/a:novell:opensuse:qemu-extra, p-cpe:/a:novell:opensuse:qemu-extra-debuginfo, p-cpe:/a:novell:opensuse:qemu-guest-agent, p-cpe:/a:novell:opensuse:qemu-guest-agent-debuginfo, p-cpe:/a:novell:opensuse:qemu-ipxe, p-cpe:/a:novell:opensuse:qemu-ksm, p-cpe:/a:novell:opensuse:qemu-kvm, p-cpe:/a:novell:opensuse:qemu-lang, p-cpe:/a:novell:opensuse:qemu-linux-user, p-cpe:/a:novell:opensuse:qemu-linux-user-debuginfo, p-cpe:/a:novell:opensuse:qemu-linux-user-debugsource, p-cpe:/a:novell:opensuse:qemu-ppc, p-cpe:/a:novell:opensuse:qemu-ppc-debuginfo, p-cpe:/a:novell:opensuse:qemu-s390, p-cpe:/a:novell:opensuse:qemu-s390-debuginfo, p-cpe:/a:novell:opensuse:qemu-seabios, p-cpe:/a:novell:opensuse:qemu-sgabios, p-cpe:/a:novell:opensuse:qemu-testsuite, p-cpe:/a:novell:opensuse:qemu-tools, p-cpe:/a:novell:opensuse:qemu-tools-debuginfo, p-cpe:/a:novell:opensuse:qemu-vgabios, p-cpe:/a:novell:opensuse:qemu-x86, p-cpe:/a:novell:opensuse:qemu-x86-debuginfo, cpe:/o:novell:opensuse:15.0

Required KB Items: Host/local_checks_enabled, Host/SuSE/release, Host/SuSE/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2019/03/23

Vulnerability Publication Date: 2018/05/22

Reference Information

CVE: CVE-2018-3639