Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9404) - Nessus

High Plugin ID: 152382

This page contains detailed information about the Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9404) 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
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 152382
Name: Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9404)
Filename: oraclelinux_ELSA-2021-9404.nasl
Vulnerability Published: 2020-09-15
This Plugin Published: 2021-08-10
Last Modification Time: 2021-09-08
Plugin Version: 1.4
Plugin Type: local
Plugin Family: Oracle Linux Local Security Checks
Dependencies: linux_alt_patch_detect.nasl, ssh_get_info.nasl
Required KB Items [?]: Host/local_checks_enabled, Host/OracleLinux, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

Synopsis

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

Description

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9404 advisory.

- fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05. (CVE-2021-33909)

- A memory disclosure flaw was found in the Linux kernel's ethernet drivers, in the way it read data from the EEPROM of the device. This flaw allows a local user to read uninitialized values from the kernel memory. The highest threat from this vulnerability is to confidentiality. (CVE-2020-14304)

- The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP, CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data. (CVE-2020-24586)

- Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW capability. (CVE-2021-23134)

- A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the system. This flaw affects all the Linux kernel versions starting from 3.13. (CVE-2021-3564)

- An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The Wi-Fi implementation does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data- confidentiality protocol. (CVE-2020-26141)

- The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed. (CVE-2020-24587)

- The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets. (CVE-2020-24588)

- An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets independent of the network configuration. (CVE-2020-26145)

- An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. (CVE-2020-26147)

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 are available

Here's the list of publicly known exploits and PoCs for verifying the Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9404) vulnerability:

GitHub: https://github.com/vanhoefm/fragattacks
[CVE-2020-24586]
GitHub: https://github.com/vanhoefm/fragattacks
[CVE-2020-24587]
GitHub: https://github.com/vanhoefm/fragattacks
[CVE-2020-24588]
GitHub: https://github.com/vanhoefm/fragattacks
[CVE-2020-26145]
GitHub: https://github.com/vanhoefm/fragattacks
[CVE-2020-26147]
GitHub: https://github.com/AlAIAL90/CVE-2021-33909
[CVE-2021-33909: PoC for exploiting CVE-2021-33909 : fs/seq_file.c in the Linux kernel 3.16 through ...]
GitHub: https://github.com/AmIAHuman/CVE-2021-33909
[CVE-2021-33909: Sequoia exploit (7/20/21)]
GitHub: https://github.com/ChoKyuWon/exploit_articles
[CVE-2021-33909]
GitHub: https://github.com/EGI-Federation/SVG-advisories
[CVE-2021-33909]
GitHub: https://github.com/H0j3n/EzpzCheatSheet
[CVE-2021-33909]
GitHub: https://github.com/Mr-xn/Penetration_Testing_POC
[CVE-2021-33909]
GitHub: https://github.com/gitezri/LinuxVulnerabilities
[CVE-2021-33909]
GitHub: https://github.com/hac425xxx/heap-exploitation-in-real-world
[CVE-2021-33909]
GitHub: https://github.com/ikramimamoglu/AmIAHuman-CVE-2021-33909
[CVE-2021-33909]
GitHub: https://github.com/joydo/CVE-Writeups
[CVE-2021-33909]
GitHub: https://github.com/kaosagnt/ansible-everyday
[CVE-2021-33909]
GitHub: https://github.com/sfowl/deep-directory
[CVE-2021-33909]
GitHub: https://github.com/xairy/linux-kernel-exploitation
[CVE-2021-33909]
GitHub: https://github.com/baerwolf/cve-2021-33909
[CVE-2021-33909: This module fixes an issue in the kernels filesystem layer (CVE-2021-33909) by ...]
GitHub: https://github.com/bbinfosec43/CVE-2021-33909
[CVE-2021-33909: Exploit code for CVE-2021-33909,Just a dump of removed https://github.com/AmIAHuman/ ...]
GitHub: https://github.com/ChrisTheCoolHut/CVE-2021-33909
[CVE-2021-33909: CVE-2021-33909 Sequoia]
GitHub: https://github.com/Liang2580/CVE-2021-33909
[CVE-2021-33909: Sequoia exploit (7/20/21)]

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-2021-33909
CVSS V2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C

CVSS Base Score:	7.2 (High)
Impact Subscore:	10.0
Exploitability Subscore:	3.9
CVSS Temporal Score:	6.3 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.3 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CVSS Base Score:	7.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	1.8
CVSS Temporal Score:	7.5 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.5 (High)

STIG Severity [?]: I
STIG Risk Rating: High

Go back to menu.

Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2021-9404.
##

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

if (description)
{
  script_id(152382);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/09/08");

  script_cve_id(
    "CVE-2020-14304",
    "CVE-2020-24586",
    "CVE-2020-24587",
    "CVE-2020-24588",
    "CVE-2020-26141",
    "CVE-2020-26145",
    "CVE-2020-26147",
    "CVE-2021-3564",
    "CVE-2021-23134",
    "CVE-2021-33909"
  );
  script_xref(name:"IAVA", value:"2021-A-0223-S");
  script_xref(name:"IAVA", value:"2021-A-0222-S");
  script_xref(name:"IAVA", value:"2021-A-0350");

  script_name(english:"Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9404)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in
the ELSA-2021-9404 advisory.

  - fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer
    allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an
    unprivileged user, aka CID-8cae8cd89f05. (CVE-2021-33909)

  - A memory disclosure flaw was found in the Linux kernel's ethernet drivers, in the way it read data from
    the EEPROM of the device. This flaw allows a local user to read uninitialized values from the kernel
    memory. The highest threat from this vulnerability is to confidentiality. (CVE-2020-14304)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent
    Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a
    network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP,
    CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.
    (CVE-2020-24586)

  - Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to
    elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local
    user with the CAP_NET_RAW capability. (CVE-2021-23134)

  - A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in
    the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the
    system. This flaw affects all the Linux kernel versions starting from 3.13. (CVE-2021-3564)

  - An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The Wi-Fi implementation
    does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can
    abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-
    confidentiality protocol. (CVE-2020-26141)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent
    Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary
    can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP,
    CCMP, or GCMP encryption key is periodically renewed. (CVE-2020-24587)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent
    Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated.
    Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an
    adversary can abuse this to inject arbitrary network packets. (CVE-2020-24588)

  - An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3
    implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process
    them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets
    independent of the network configuration. (CVE-2020-26145)

  - An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble
    fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject
    packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP,
    CCMP, or GCMP data-confidentiality protocol is used. (CVE-2020-26147)

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://linux.oracle.com/errata/ELSA-2021-9404.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-33909");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/09/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/08/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-uek-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:python-perf");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


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

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
var os_ver = os_ver[1];
if (! preg(pattern:"^(7|8)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7 / 8', 'Oracle 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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var machine_uptrack_level = get_one_kb_item('Host/uptrack-uname-r');
if (machine_uptrack_level)
{
  var trimmed_uptrack_level = ereg_replace(string:machine_uptrack_level, pattern:"\.(x86_64|i[3-6]86|aarch64)$", replace:'');
  var fixed_uptrack_levels = ['5.4.17-2102.204.4.2.el7uek', '5.4.17-2102.204.4.2.el8uek'];
  foreach var fixed_uptrack_level ( fixed_uptrack_levels ) {
    if (rpm_spec_vers_cmp(a:trimmed_uptrack_level, b:fixed_uptrack_level) >= 0)
    {
      audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for ELSA-2021-9404');
    }
  }
  __rpm_report = 'Running KSplice level of ' + trimmed_uptrack_level + ' does not meet the minimum fixed level of ' + join(fixed_uptrack_levels, sep:' / ') + ' for this advisory.\n\n';
}

var kernel_major_minor = get_kb_item('Host/uname/major_minor');
if (empty_or_null(kernel_major_minor)) exit(1, 'Unable to determine kernel major-minor level.');
var expected_kernel_major_minor = '5.4';
if (kernel_major_minor != expected_kernel_major_minor)
  audit(AUDIT_OS_NOT, 'running kernel level ' + expected_kernel_major_minor + ', it is running kernel level ' + kernel_major_minor);

var pkgs = [
    {'reference':'kernel-uek-5.4.17-2102.204.4.2.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-5.4.17'},
    {'reference':'kernel-uek-5.4.17-2102.204.4.2.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-5.4.17'},
    {'reference':'kernel-uek-debug-5.4.17-2102.204.4.2.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-5.4.17'},
    {'reference':'kernel-uek-debug-5.4.17-2102.204.4.2.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-5.4.17'},
    {'reference':'kernel-uek-debug-devel-5.4.17-2102.204.4.2.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-5.4.17'},
    {'reference':'kernel-uek-debug-devel-5.4.17-2102.204.4.2.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-5.4.17'},
    {'reference':'kernel-uek-devel-5.4.17-2102.204.4.2.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-5.4.17'},
    {'reference':'kernel-uek-devel-5.4.17-2102.204.4.2.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-5.4.17'},
    {'reference':'kernel-uek-doc-5.4.17-2102.204.4.2.el7uek', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-doc-5.4.17'},
    {'reference':'kernel-uek-tools-5.4.17-2102.204.4.2.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-tools-5.4.17'},
    {'reference':'kernel-uek-tools-5.4.17-2102.204.4.2.el7uek', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-tools-5.4.17'},
    {'reference':'kernel-uek-tools-libs-5.4.17-2102.204.4.2.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-tools-libs-5.4.17'},
    {'reference':'perf-5.4.17-2102.204.4.2.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'python-perf-5.4.17-2102.204.4.2.el7uek', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'kernel-uek-5.4.17-2102.204.4.2.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-5.4.17'},
    {'reference':'kernel-uek-5.4.17-2102.204.4.2.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-5.4.17'},
    {'reference':'kernel-uek-debug-5.4.17-2102.204.4.2.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-5.4.17'},
    {'reference':'kernel-uek-debug-5.4.17-2102.204.4.2.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-5.4.17'},
    {'reference':'kernel-uek-debug-devel-5.4.17-2102.204.4.2.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-5.4.17'},
    {'reference':'kernel-uek-debug-devel-5.4.17-2102.204.4.2.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-debug-devel-5.4.17'},
    {'reference':'kernel-uek-devel-5.4.17-2102.204.4.2.el8uek', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-5.4.17'},
    {'reference':'kernel-uek-devel-5.4.17-2102.204.4.2.el8uek', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-devel-5.4.17'},
    {'reference':'kernel-uek-doc-5.4.17-2102.204.4.2.el8uek', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-uek-doc-5.4.17'}
];

var flag = 0;
foreach var 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;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = 'EL' + 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 (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && release) {
    if (exists_check) {
        if (rpm_exists(release:release, rpm:exists_check) && 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++;
    } else {
        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, 'kernel-uek / kernel-uek-debug / kernel-uek-debug-devel / etc');
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/oraclelinux_ELSA-2021-9404.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\oraclelinux_ELSA-2021-9404.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/oraclelinux_ELSA-2021-9404.nasl

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How to Run

Here is how to run the Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9404) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Oracle Linux Local Security Checks plugin family.
On the right side table select Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9404) plugin ID 152382.
Specify the target on the Settings tab and click to Save the scan.
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 oraclelinux_ELSA-2021-9404.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a oraclelinux_ELSA-2021-9404.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - oraclelinux_ELSA-2021-9404.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 oraclelinux_ELSA-2021-9404.nasl -t <IP/HOST>

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References

IAVA | Information Assurance Vulnerability Alert:

2021-A-0222-S, 2021-A-0223-S, 2021-A-0350

See also:

Similar and related Nessus plugins:

152018 - Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9372)
152045 - OracleVM 3.4 : kernel-uek (OVMSA-2021-0023)
152053 - Photon OS 1.0: Linux PHSA-2021-1.0-0416
152055 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2451-1)
152080 - RHEL 8 : OpenShift Container Platform 4.7.21 (RHSA-2021:2763)
152089 - Scientific Linux Security Update : kernel on SL7.x x86_64 (2021:2725)
152094 - Oracle Linux 6 : kernel (ELSA-2021-9374)
152108 - SUSE SLES15 Security Update : kernel (Live Patch 16 for SLE 15 SP2) (SUSE-SU-2021:2487-1)
152116 - SUSE SLES15 Security Update : kernel (Live Patch 14 for SLE 15 SP2) (SUSE-SU-2021:2538-1)
152142 - SUSE SLES15 Security Update : kernel (Live Patch 21 for SLE 15 SP1) (SUSE-SU-2021:2542-1)
152159 - SUSE SLES15 Security Update : kernel (Live Patch 22 for SLE 15 SP1) (SUSE-SU-2021:2560-1)
152160 - SUSE SLES15 Security Update : kernel (Live Patch 2 for SLE 15 SP3) (SUSE-SU-2021:2559-1)
152167 - SUSE SLES15 Security Update : kernel (Live Patch 15 for SLE 15 SP2) (SUSE-SU-2021:2577-1)
152188 - SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 18 for SLE 12 SP4) (SUSE-SU-2021:2584-1)
152195 - Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9395)
152308 - EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2246)
152313 - EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2272)
152389 - Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9406)
152398 - OracleVM 3.4 : kernel-uek (OVMSA-2021-0025)
152464 - Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9407)
152465 - Oracle Linux 7 : Unbreakable Enterprise kernel-container (ELSA-2021-9410)
152481 - SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2643-1)
152545 - SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2678-1)
152639 - Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-5045-1)
152640 - Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-5044-1)
152665 - Ubuntu 20.04 LTS / 21.04 : Linux kernel vulnerabilities (USN-5046-1)
152774 - Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5050-1)
153080 - EulerOS 2.0 SP5 : kernel (EulerOS-SA-2021-2336)
153127 - Ubuntu 21.04 : Linux kernel (KVM) vulnerabilities (USN-4997-2)
153129 - Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5017-1)
153130 - Ubuntu 16.04 LTS / 18.04 LTS / 21.04 : Linux kernel vulnerability (USN-5014-1)
153131 - Ubuntu 20.04 LTS : Linux kernel (KVM) vulnerabilities (USN-5000-2)
153148 - Debian DLA-2714-1 : linux-4.19 - LTS security update
153271 - EulerOS 2.0 SP2 : kernel (EulerOS-SA-2021-2392)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file oraclelinux_ELSA-2021-9404.nasl version 1.4. For more plugins, visit the Nessus Plugin Library.

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Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9404) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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