RHEL 7 : kernel (RHSA-2021:3522)

high Nessus Plugin ID 153371

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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-2021:3522 advisory.

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

Security Fix(es):

* kernel: Use after free via PI futex state (CVE-2021-3347)

* kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)

* kernel: race condition for removal of the HCI controller (CVE-2021-32399)

* kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c (CVE-2020-8648)

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

Bug Fix(es):

* sysfs: cannot create duplicate filename '/class/mdio_bus/ixgbe-8100 (BZ#1972707)

* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1975158)

* SAN Switch rebooted and caused (?) OpenStack compute node to reboot (BZ#1984118)

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-2021:3522.

Plugin Details

Severity: High

ID: 153371

File Name: redhat-RHSA-2021-3522.nasl

Version: 1.14

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 9/14/2021

Updated: 11/7/2024

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.7

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-2021-3347

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:bpftool, p-cpe:/a:redhat:enterprise_linux:kernel-tools, cpe:/o:redhat:rhel_e4s:7.7, cpe:/o:redhat:rhel_aus:7.7, 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-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, p-cpe:/a:redhat:enterprise_linux:kernel-debug, cpe:/o:redhat:rhel_tus:7.7, 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: 9/14/2021

Vulnerability Publication Date: 2/6/2020

Exploitable With

CANVAS (CANVAS)

Core Impact

Metasploit (Netfilter x_tables Heap OOB Write Privilege Escalation)

Reference Information

CVE: CVE-2020-8648, CVE-2021-22555, CVE-2021-32399, CVE-2021-3347

CWE: 362, 416, 787

RHSA: 2021:3522

Detections

Analytics