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RHEL 7 : Virtualization (RHSA-2018:1690) (Spectre)

medium Nessus Plugin ID 110081

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for vdsm is now available for RHEV 3.X Hypervisor and Agents Extended Lifecycle Support for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The VDSM service is required by a Virtualization Manager to manage the Linux hosts. VDSM manages and monitors the host's storage, memory and networks as well as virtual machine creation, other host administration tasks, statistics gathering, and log collection.

Security Fix(es) :

* An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639)

Note: This is the VDSM side of the CVE-2018-3639 mitigation.

Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue.

Solution

Update the affected packages.

See Also

https://access.redhat.com/security/vulnerabilities/ssbd

https://access.redhat.com/errata/RHSA-2018:1690

https://access.redhat.com/security/cve/cve-2018-3639

Plugin Details

Severity: Medium

ID: 110081

File Name: redhat-RHSA-2018-1690.nasl

Version: 1.16

Type: local

Agent: unix

Published: 5/24/2018

Updated: 10/1/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

CVSS Score Source: CVE-2018-3639

CVSS v3

Risk Factor: Medium

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:redhat:enterprise_linux:vdsm-hook-openstacknet, p-cpe:/a:redhat:enterprise_linux:vdsm-debug-plugin, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-vhostmd, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-fcoe, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-ethtool-options, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-macspoof, p-cpe:/a:redhat:enterprise_linux:vdsm-jsonrpc, p-cpe:/a:redhat:enterprise_linux:vdsm-yajsonrpc, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:vdsm-xmlrpc, p-cpe:/a:redhat:enterprise_linux:vdsm-infra, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-vmfex-dev, p-cpe:/a:redhat:enterprise_linux:vdsm-cli, p-cpe:/a:redhat:enterprise_linux:vdsm, p-cpe:/a:redhat:enterprise_linux:vdsm-python

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/22/2018

Vulnerability Publication Date: 5/22/2018

Reference Information

CVE: CVE-2018-3639

IAVA: 2018-A-0170

RHSA: 2018:1690