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RHEL 7 : kernel (RHSA-2018:3591)

high Nessus Plugin ID 118948

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Synopsis

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

Description

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3591 advisory.

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

 Security Fix(es):

 * kernel: out-of-bounds access in the show_timer function in kernel/time/posix-timers.c (CVE-2017-18344)

 * kernel: Integer overflow in Linux's create_elf_tables function (CVE-2018-14634)

 For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

 Red Hat would like to thank Qualys Research Labs for reporting CVE-2018-14634.

 Bug Fix(es):

 * On systems running Red Hat Enterprise Linux 7.3 with Red Hat OpenShift Container Platform 3.5, a node sometimes got into NodeNotReady state after a CPU softlockup. Consequently, the node was not available.
 This update fixes some scheduling latency sources in memory compaction and in the inodes memory reclaim.
 As a result, nodes no longer get into NodeNotReady state under the described circumstances. (BZ#1625866)

 * Previously, a kernel panic occurred when the kernel tried to make an out of bound access to the array that describes the L1 Terminal Fault (L1TF) mitigation state on systems without Extended Page Tables (EPT) support. This update extends the array of mitigation states to cover all the states, which effectively prevents out of bound array access. Also, this update enables rejecting invalid, irrelevant values, that might be erroneously provided by the userspace. As a result, the kernel no longer panics in the described scenario. (BZ#1629566)

 * Previously, a packet was missing the User Datagram Protocol (UDP) payload checksum during a full checksum computation, if the hardware checksum was not applied. As a consequence, a packet with an incorrect checksum was dropped by a peer. With this update, the kernel includes the UDP payload checksum during the full checksum computation. As a result, the checksum is computed correctly and the packet can be received by the peer. (BZ#1635794)

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 package based on the guidance in RHSA-2018:3591.

See Also

http://www.nessus.org/u?7bbad3fc

https://access.redhat.com/security/vulnerabilities/mutagen-astronomy

https://bugzilla.redhat.com/show_bug.cgi?id=1610958

https://bugzilla.redhat.com/show_bug.cgi?id=1624498

https://access.redhat.com/errata/RHSA-2018:3591

https://access.redhat.com/security/updates/classification/#important

Plugin Details

Severity: High

ID: 118948

File Name: redhat-RHSA-2018-3591.nasl

Version: 1.12

Type: local

Agent: unix

Published: 11/14/2018

Updated: 11/5/2024

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: 7.4

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2018-14634

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kernel-tools, p-cpe:/a:redhat:enterprise_linux:kernel, p-cpe:/a:redhat:enterprise_linux:kernel-headers, cpe:/o:redhat:rhel_eus:7.3, 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-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-devel, 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: 11/13/2018

Vulnerability Publication Date: 7/26/2018

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2017-18344, CVE-2018-14634

CWE: 125, 190

RHSA: 2018:3591