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

High Nessus Plugin ID 111002

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, x86 AMD)

- kernel: Use-after-free vulnerability in mm/mempolicy.c:do_get_mempolicy function allows local denial of service or other unspecified impact (CVE-2018-10675)

- Kernel: FPU state information leakage via lazy FPU restore (CVE-2018-3665)

- kernel: error in exception handling leads to DoS (CVE-2018-8897 regression) (CVE-2018-10872)

Bug Fix(es) :

- Previously, microcode updates on 32 and 64-bit AMD and Intel architectures were not synchronized. As a consequence, it was not possible to apply the microcode updates. This fix adds the synchronization to the microcode updates so that processors of the stated architectures receive updates at the same time. As a result, microcode updates are now synchronized.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?bad6889b

Plugin Details

Severity: High

ID: 111002

File Name: sl_20180710_kernel_on_SL6_x.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2018/07/11

Modified: 2018/09/04

Dependencies: 12634

Risk Information

Risk Factor: High

CVSSv2

Base Score: 7.2

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

CVSSv3

Base Score: 7.8

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/07/10

Exploitable With

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

Reference Information

CVE: CVE-2018-10675, CVE-2018-10872, CVE-2018-3639, CVE-2018-3665, CVE-2018-8897