RHEL 7 : Virtualization (RHSA-2018:0050) (Spectre)

medium Nessus Plugin ID 105680

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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 4.X, RHEV-H, and Agents 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 instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation 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 cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks. (CVE-2017-5715)

Note: This is the vdsm side of the CVE-2017-5715 mitigation.

Red Hat would like to thank Google Project Zero for reporting this issue.

Solution

Update the affected packages.

Plugin Details

Severity: Medium

ID: 105680

File Name: redhat-RHSA-2018-0050.nasl

Version: 3.18

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 1/9/2018

Updated: 8/11/2023

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

Risk Information

VPR

Risk Factor: High

Score: 7.6

CVSS v2

Risk Factor: Low

Base Score: 1.9

Temporal Score: 1.7

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

CVSS v3

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 5.4

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:vdsm-api, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-vfio-mdev, p-cpe:/a:redhat:enterprise_linux:vdsm-python, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-openstacknet, p-cpe:/a:redhat:enterprise_linux:vdsm-jsonrpc, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-fcoe, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-macspoof, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-ethtool-options, p-cpe:/a:redhat:enterprise_linux:vdsm-xmlrpc, p-cpe:/a:redhat:enterprise_linux:vdsm-gluster, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-nestedvt, p-cpe:/a:redhat:enterprise_linux:vdsm, p-cpe:/a:redhat:enterprise_linux:vdsm-client, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-vhostmd, p-cpe:/a:redhat:enterprise_linux:vdsm-yajsonrpc, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-localdisk, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-extra-ipv4-addrs, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-checkips, p-cpe:/a:redhat:enterprise_linux:vdsm-hook-vmfex-dev, p-cpe:/a:redhat:enterprise_linux:vdsm-cli

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: 1/5/2018

Vulnerability Publication Date: 1/4/2018

Reference Information

CVE: CVE-2017-5715

IAVA: 2018-A-0017-S, 2018-A-0020

RHSA: 2018:0050

Detections

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