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Test ID:1.3.6.1.4.1.25623.1.0.882836
Category:CentOS Local Security Checks
Title:CentOS Update for kernel CESA-2018:0151 centos7
Summary:Check the version of kernel
Description:Summary:
Check the version of kernel

Vulnerability Insight:
The kernel packages contain the Linux kernel,
the core of any Linux operating system.

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.

Note: This issue is present in hardware and cannot be fully fixed via
software update. The updated kernel packages provide software mitigation
for this hardware issue at a cost of potential performance penalty. Please
refer to References section for further information about this issue and
the performance impact.

In this update initial mitigations for IBM Power (PowerPC) and IBM zSeries
(S390) architectures are provided.

* 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. This fix specifically addresses S390
processors. (CVE-2017-5715, Important)

* Variant CVE-2017-5753 triggers the speculative execution by performing a
bounds-check bypass. 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
boundary and read privileged memory by conducting targeted cache
side-channel attacks. This fix specifically addresses S390 and PowerPC
processors. (CVE-2017-5753, Important)

* Variant CVE-2017-5754 relies on the fact that, on impacted
microprocessors, during speculative execution of instruction permission
faults, exception generation triggered by a faulting access is suppressed
until the retirement of the whole instruction block. In a combination with
the fact that memory accesses may populate the cache even when the block is
being dropped and never committed (executed), an unprivileged local
attacker could use this flaw to read privileged (kernel space) memory by
conducting targeted cache side-channel attacks. Note: CVE-2017- ...

Description truncated, please see the referenced URL(s) for more information.

Affected Software/OS:
kernel on CentOS 7

Solution:
Please Install the Updated Packages.

CVSS Score:
7.2

CVSS Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2015-8539
http://www.openwall.com/lists/oss-security/2015/12/09/1
RedHat Security Advisories: RHSA-2018:0151
https://access.redhat.com/errata/RHSA-2018:0151
RedHat Security Advisories: RHSA-2018:0152
https://access.redhat.com/errata/RHSA-2018:0152
RedHat Security Advisories: RHSA-2018:0181
https://access.redhat.com/errata/RHSA-2018:0181
SuSE Security Announcement: SUSE-SU-2016:0335 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html
SuSE Security Announcement: SUSE-SU-2016:0336 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00008.html
SuSE Security Announcement: SUSE-SU-2016:0337 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html
SuSE Security Announcement: SUSE-SU-2016:0339 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00011.html
SuSE Security Announcement: SUSE-SU-2016:0380 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html
SuSE Security Announcement: SUSE-SU-2016:0381 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html
SuSE Security Announcement: SUSE-SU-2016:0383 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html
SuSE Security Announcement: SUSE-SU-2016:0384 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html
SuSE Security Announcement: SUSE-SU-2016:0386 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00021.html
SuSE Security Announcement: SUSE-SU-2016:0387 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00022.html
SuSE Security Announcement: SUSE-SU-2016:0434 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html
SuSE Security Announcement: SUSE-SU-2016:0911 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
SuSE Security Announcement: SUSE-SU-2016:1102 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
SuSE Security Announcement: SUSE-SU-2016:1937 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
SuSE Security Announcement: SUSE-SU-2016:2074 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
https://usn.ubuntu.com/3798-1/
https://usn.ubuntu.com/3798-2/
Common Vulnerability Exposure (CVE) ID: CVE-2017-7472
BugTraq ID: 98422
http://www.securityfocus.com/bid/98422
https://www.exploit-db.com/exploits/42136/
http://www.securitytracker.com/id/1038471
SuSE Security Announcement: SUSE-SU-2018:0011 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
Common Vulnerability Exposure (CVE) ID: CVE-2017-5715
BugTraq ID: 102376
http://www.securityfocus.com/bid/102376
Bugtraq: 20190624 [SECURITY] [DSA 4469-1] libvirt security update (Google Search)
https://seclists.org/bugtraq/2019/Jun/36
Bugtraq: 20191112 FreeBSD Security Advisory FreeBSD-SA-19:26.mcu (Google Search)
https://seclists.org/bugtraq/2019/Nov/16
CERT/CC vulnerability note: VU#180049
https://www.kb.cert.org/vuls/id/180049
CERT/CC vulnerability note: VU#584653
http://www.kb.cert.org/vuls/id/584653
Cisco Security Advisory: 20180104 CPU Side-Channel Information Disclosure Vulnerabilities
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180104-cpusidechannel
Debian Security Information: DSA-4120 (Google Search)
https://www.debian.org/security/2018/dsa-4120
Debian Security Information: DSA-4187 (Google Search)
https://www.debian.org/security/2018/dsa-4187
Debian Security Information: DSA-4188 (Google Search)
https://www.debian.org/security/2018/dsa-4188
Debian Security Information: DSA-4213 (Google Search)
https://www.debian.org/security/2018/dsa-4213
https://www.exploit-db.com/exploits/43427/
FreeBSD Security Advisory: FreeBSD-SA-18:03
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:03.speculative_execution.asc
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:26.mcu.asc
https://security.gentoo.org/glsa/201810-06
http://packetstormsecurity.com/files/145645/Spectre-Information-Disclosure-Proof-Of-Concept.html
http://packetstormsecurity.com/files/155281/FreeBSD-Security-Advisory-FreeBSD-SA-19-26.mcu.html
https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html
https://security.googleblog.com/2018/01/todays-cpu-vulnerability-what-you-need.html
https://spectreattack.com/
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
https://lists.debian.org/debian-lts-announce/2018/09/msg00017.html
https://lists.debian.org/debian-lts-announce/2020/03/msg00025.html
https://lists.debian.org/debian-lts-announce/2021/08/msg00019.html
RedHat Security Advisories: RHSA-2018:0292
https://access.redhat.com/errata/RHSA-2018:0292
http://www.securitytracker.com/id/1040071
SuSE Security Announcement: SUSE-SU-2018:0006 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00002.html
SuSE Security Announcement: SUSE-SU-2018:0007 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00003.html
SuSE Security Announcement: SUSE-SU-2018:0008 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00004.html
SuSE Security Announcement: SUSE-SU-2018:0009 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00005.html
SuSE Security Announcement: SUSE-SU-2018:0010 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html
SuSE Security Announcement: SUSE-SU-2018:0012 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html
SuSE Security Announcement: SUSE-SU-2018:0019 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00012.html
SuSE Security Announcement: SUSE-SU-2018:0020 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00013.html
SuSE Security Announcement: openSUSE-SU-2018:0013 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00009.html
SuSE Security Announcement: openSUSE-SU-2018:0022 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html
SuSE Security Announcement: openSUSE-SU-2018:0023 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html
https://usn.ubuntu.com/usn/usn-3516-1/
https://usn.ubuntu.com/3531-1/
https://usn.ubuntu.com/3531-3/
https://usn.ubuntu.com/3540-2/
https://usn.ubuntu.com/3541-2/
https://usn.ubuntu.com/3542-2/
https://usn.ubuntu.com/3549-1/
https://usn.ubuntu.com/3560-1/
https://usn.ubuntu.com/3561-1/
https://usn.ubuntu.com/3580-1/
https://usn.ubuntu.com/3581-1/
https://usn.ubuntu.com/3581-2/
https://usn.ubuntu.com/3582-1/
https://usn.ubuntu.com/3582-2/
https://usn.ubuntu.com/3594-1/
https://usn.ubuntu.com/3597-1/
https://usn.ubuntu.com/3597-2/
https://usn.ubuntu.com/3620-2/
https://usn.ubuntu.com/3690-1/
https://usn.ubuntu.com/3777-3/
Common Vulnerability Exposure (CVE) ID: CVE-2017-5753
BugTraq ID: 102371
http://www.securityfocus.com/bid/102371
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
https://usn.ubuntu.com/3540-1/
https://usn.ubuntu.com/3541-1/
https://usn.ubuntu.com/3542-1/
Common Vulnerability Exposure (CVE) ID: CVE-2017-5754
BugTraq ID: 102378
http://www.securityfocus.com/bid/102378
BugTraq ID: 106128
http://www.securityfocus.com/bid/106128
Debian Security Information: DSA-4078 (Google Search)
https://www.debian.org/security/2018/dsa-4078
Debian Security Information: DSA-4082 (Google Search)
https://www.debian.org/security/2018/dsa-4082
https://meltdownattack.com/
https://www.oracle.com/security-alerts/cpuapr2020.html
https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html
https://usn.ubuntu.com/usn/usn-3522-2/
https://usn.ubuntu.com/3522-3/
https://usn.ubuntu.com/3522-4/
https://usn.ubuntu.com/3523-1/
https://usn.ubuntu.com/usn/usn-3523-2/
https://usn.ubuntu.com/usn/usn-3524-2/
https://usn.ubuntu.com/usn/usn-3525-1/
https://usn.ubuntu.com/3583-1/
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