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?d22d741a

Plugin Details

Severity: High

ID: 111002

File Name: sl_20180710_kernel_on_SL6_x.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2018/07/11

Modified: 2018/12/27

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

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

CVSS v3.0

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

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