Scientific Linux Security Update : libvirt on SL6.x i386/x86_64 (Spectre)

Medium Nessus Plugin ID 105570

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 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 libvirt side of the CVE-2017-5715 mitigation.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?fe28b019

Plugin Details

Severity: Medium

ID: 105570

File Name: sl_20180104_libvirt_on_SL6_x.nasl

Version: Revision: 3.5

Type: local

Agent: unix

Published: 2018/01/04

Modified: 2018/01/29

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 4.7

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

CVSSv3

Base Score: 5.6

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

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

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

Patch Publication Date: 2018/01/04

Reference Information

CVE: CVE-2017-5715

IAVA: 2018-A-0020