Scientific Linux Security Update : kernel on SL7.x x86_64 (2022:0620) - Nessus

High   Plugin ID: 158330

This page contains detailed information about the Scientific Linux Security Update : kernel on SL7.x x86_64 (2022:0620) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents
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Plugin Overview

ID: 158330
Name: Scientific Linux Security Update : kernel on SL7.x x86_64 (2022:0620)
Filename: sl_20220223_kernel_on_SL7_x.nasl
Vulnerability Published: 2020-12-14
This Plugin Published: 2022-02-24
Last Modification Time: 2022-03-01
Plugin Version: 1.3
Plugin Type: local
Plugin Family: Scientific Linux Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

Severity: High
Vulnerability Published: 2020-12-14
Patch Published: 2022-02-23
CVE [?]: CVE-2020-0465, CVE-2020-0466, CVE-2021-0920, CVE-2021-3564, CVE-2021-3573, CVE-2021-3752, CVE-2021-4155, CVE-2022-0330, CVE-2022-22942
CPE [?]: cpe:/o:fermilab:scientific_linux, p-cpe:/a:fermilab:scientific_linux:bpftool, p-cpe:/a:fermilab:scientific_linux:bpftool-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel, p-cpe:/a:fermilab:scientific_linux:kernel-abi-whitelists, p-cpe:/a:fermilab:scientific_linux:kernel-debug, p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-x86_64, p-cpe:/a:fermilab:scientific_linux:kernel-debug-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-debug-devel, p-cpe:/a:fermilab:scientific_linux:kernel-devel, p-cpe:/a:fermilab:scientific_linux:kernel-headers, p-cpe:/a:fermilab:scientific_linux:kernel-tools, p-cpe:/a:fermilab:scientific_linux:kernel-tools-debuginfo, p-cpe:/a:fermilab:scientific_linux:kernel-tools-libs, p-cpe:/a:fermilab:scientific_linux:kernel-tools-libs-devel, p-cpe:/a:fermilab:scientific_linux:perf, p-cpe:/a:fermilab:scientific_linux:perf-debuginfo, p-cpe:/a:fermilab:scientific_linux:python-perf, p-cpe:/a:fermilab:scientific_linux:python-perf-debuginfo

Synopsis

The remote Scientific Linux host is missing one or more security updates.

Description

The remote Scientific Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the SLSA-2022:0620-1 advisory.

- kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466)

- kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)

- kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)

- kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)

- kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)

- kernel: out of bounds write in hid-multitouch.c may lead to escalation of privilege (CVE-2020-0465)

- kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)

- kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)

- kernel: possible use-after-free in bluetooth module (CVE-2021-3752)

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

Solution

Update the affected packages.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the Scientific Linux Security Update : kernel on SL7.x x86_64 (2022:0620) vulnerability:

  1. GitHub: https://github.com/enterprisemodules/vulnerability_demo
    [CVE-2021-0920]
  2. GitHub: https://github.com/xairy/linux-kernel-exploitation
    [CVE-2021-3573]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2021-3752
CVSS V2 Vector: AV:A/AC:M/Au:N/C:C/I:C/A:C/E:U/RL:OF/RC:C
CVSS Base Score:7.9 (High)
Impact Subscore:10.0
Exploitability Subscore:5.5
CVSS Temporal Score:5.8 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:5.8 (Medium)
CVSS V3 Vector: CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS Base Score:7.1 (High)
Impact Subscore:5.9
Exploitability Subscore:1.2
CVSS Temporal Score:6.2 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:6.2 (Medium)

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Plugin Source

This is the sl_20220223_kernel_on_SL7_x.nasl nessus plugin source code. This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof. 

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##
# The descriptive text is (C) Scientific Linux.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(158330);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/03/01");

  script_cve_id(
    "CVE-2020-0465",
    "CVE-2020-0466",
    "CVE-2021-0920",
    "CVE-2021-3564",
    "CVE-2021-3573",
    "CVE-2021-3752",
    "CVE-2021-4155",
    "CVE-2022-0330",
    "CVE-2022-22942"
  );
  script_xref(name:"RHSA", value:"RHSA-2022:0620");

  script_name(english:"Scientific Linux Security Update : kernel on SL7.x x86_64 (2022:0620)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Scientific Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Scientific Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in
the SLSA-2022:0620-1 advisory.

  - kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466)

  - kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)

  - kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)

  - kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)

  - kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)

  - kernel: out of bounds write in hid-multitouch.c may lead to escalation of  privilege (CVE-2020-0465)

  - kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)

  - kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)

  - kernel: possible use-after-free in bluetooth module (CVE-2021-3752)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.scientificlinux.org/category/sl-errata/slsa-20220620-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3752");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/12/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fermilab:scientific_linux");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:bpftool-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-abi-whitelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-x86_64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-tools-libs-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:perf-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:python-perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:python-perf-debuginfo");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Scientific Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/RedHat/release');
if (isnull(release) || 'Scientific Linux' >!< release) audit(AUDIT_OS_NOT, 'Scientific Linux');
var os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Scientific Linux');
var os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Scientific Linux 7.x', 'Scientific Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Scientific Linux', cpu);

var pkgs = [
    {'reference':'bpftool-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'bpftool-debuginfo-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-abi-whitelists-3.10.0-1160.59.1.el7', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-debug-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-debug-debuginfo-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-debug-devel-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-debuginfo-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-debuginfo-common-x86_64-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-devel-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-headers-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-tools-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-tools-debuginfo-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-tools-libs-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-tools-libs-devel-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'perf-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'perf-debuginfo-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python-perf-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python-perf-debuginfo-3.10.0-1160.59.1.el7', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var sp = NULL;
  var cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (reference && release) {
    if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'bpftool / bpftool-debuginfo / kernel / etc');
}

The latest version of this script can be found in these locations depending on your platform:

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/sl_20220223_kernel_on_SL7_x.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\sl_20220223_kernel_on_SL7_x.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/sl_20220223_kernel_on_SL7_x.nasl

Go back to menu.

How to Run

Here is how to run the Scientific Linux Security Update : kernel on SL7.x x86_64 (2022:0620) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Scientific Linux Local Security Checks plugin family.
  6. On the right side table select Scientific Linux Security Update : kernel on SL7.x x86_64 (2022:0620) plugin ID 158330.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl sl_20220223_kernel_on_SL7_x.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a sl_20220223_kernel_on_SL7_x.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - sl_20220223_kernel_on_SL7_x.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state sl_20220223_kernel_on_SL7_x.nasl -t <IP/HOST>

Go back to menu.

References

RHSA | Red Hat Security Advisory: See also: Similar and related Nessus plugins:
  • 158438 - CentOS 7 : kernel (CESA-2022:0620)
  • 158266 - RHEL 7 : kernel (RHSA-2022:0620)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file sl_20220223_kernel_on_SL7_x.nasl version 1.3. For more plugins, visit the Nessus Plugin Library.

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