RHEL 6 / 7 : rhev-hypervisor7 (RHSA-2018:1711)

high Nessus Plugin ID 110113

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Synopsis

The remote Red Hat host is missing one or more security updates for rhev-hypervisor7.

Description

The remote Redhat Enterprise Linux 6 / 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2018:1711 advisory.

The rhev-hypervisor7 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor.
It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent.

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 rhev-hypervisor7 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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL rhev-hypervisor7 package based on the guidance in RHSA-2018:1711.

Plugin Details

Severity: High

ID: 110113

File Name: redhat-RHSA-2018-1711.nasl

Version: 1.16

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 5/25/2018

Updated: 6/3/2024

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.5

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2018-8897

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:rhev-hypervisor7, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7

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: 5/23/2018

Vulnerability Publication Date: 5/8/2018

Exploitable With

Metasploit (Microsoft Windows POP/MOV SS Local Privilege Elevation Vulnerability)

Reference Information

CVE: CVE-2018-1087, CVE-2018-3639, CVE-2018-8897

CWE: 200, 250

IAVA: 2018-A-0170

RHSA: 2018:1711

Detections

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