Scientific Linux Security Update : qemu-kvm on SL6.x i386/x86_64 (20180710) (Spectre)

medium Nessus Plugin ID 111003

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Synopsis

The remote Scientific Linux host is missing one or more security updates.

Description

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 qemu-kvm side of the CVE-2018-3639 mitigation.

- QEMU: cirrus: OOB access when updating VGA display (CVE-2018-7858)

- QEMU: vga: OOB read access during display update (CVE-2017-13672)

- Qemu: Out-of-bounds read in vga_draw_text routine (CVE-2018-5683)

Solution

Update the affected packages.

Plugin Details

Severity: Medium

ID: 111003

File Name: sl_20180710_qemu_kvm_on_SL6_x.nasl

Version: 1.6

Type: local

Agent: unix

Family: Scientific Linux Local Security Checks

Published: 7/11/2018

Updated: 9/5/2024

Supported Sensors: 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:fermilab:scientific_linux:qemu-guest-agent, p-cpe:/a:fermilab:scientific_linux:qemu-kvm-tools, x-cpe:/o:fermilab:scientific_linux, p-cpe:/a:fermilab:scientific_linux:qemu-img, p-cpe:/a:fermilab:scientific_linux:qemu-kvm, p-cpe:/a:fermilab:scientific_linux:qemu-kvm-debuginfo

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: 7/10/2018

Vulnerability Publication Date: 9/1/2017

Reference Information

CVE: CVE-2017-13672, CVE-2018-3639, CVE-2018-5683, CVE-2018-7858

Detections

Analytics