RHEL 7 : kernel-alt (RHSA-2018:1967)

medium Nessus Plugin ID 110709

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Synopsis

The remote Red Hat host is missing one or more security updates for kernel-alt.

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:1967 advisory.

The kernel-alt packages provide the Linux kernel version 4.x.

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, PowerPC)

* This release also includes next iteration of the CVE-2017-5715 mitigation that includes the SMCCC (Secure Monitor Call Calling Convention) 1.1 support. (CVE-2017-5715, ARM)

Red Hat would like to thank Google Project Zero for reporting CVE-2017-5715 and Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting CVE-2018-3639.

Bug Fix(es):

These updated kernel-alt packages include numerous bug fixes. Space precludes documenting all of the bug fixes in this advisory. See the descriptions in the related Knowledge Article:
https://access.redhat.com/articles/3485851

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL kernel-alt package based on the guidance in RHSA-2018:1967.

Plugin Details

Severity: Medium

ID: 110709

File Name: redhat-RHSA-2018-1967.nasl

Version: 1.20

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 6/27/2018

Updated: 9/13/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.8

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: 5.6

Temporal Score: 5.4

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

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

CVSS Score Source: CVE-2017-5715

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kernel-tools, p-cpe:/a:redhat:enterprise_linux:kernel-headers, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:kernel-devel, p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs-devel, p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-kdump, p-cpe:/a:redhat:enterprise_linux:kernel-bootwrapper, p-cpe:/a:redhat:enterprise_linux:kernel-alt, p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs, p-cpe:/a:redhat:enterprise_linux:python-perf, p-cpe:/a:redhat:enterprise_linux:kernel-kdump-devel, p-cpe:/a:redhat:enterprise_linux:kernel, p-cpe:/a:redhat:enterprise_linux:kernel-debug, p-cpe:/a:redhat:enterprise_linux:perf

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: 6/26/2018

Vulnerability Publication Date: 1/4/2018

Reference Information

CVE: CVE-2017-5715, CVE-2018-3639

CWE: 200

IAVA: 2018-A-0020

RHSA: 2018:1967

Detections

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