RHEL 6 : kernel (RHSA-2021:2735) - Nessus

High Plugin ID: 155787

This page contains detailed information about the RHEL 6 : kernel (RHSA-2021:2735) 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: 155787
Name: RHEL 6 : kernel (RHSA-2021:2735)
Filename: redhat-RHSA-2021-2735.nasl
Vulnerability Published: 2021-01-29
This Plugin Published: 2021-12-02
Last Modification Time: 2021-12-03
Plugin Version: 1.3
Plugin Type: local
Plugin Family: Red Hat Local Security Checks
Dependencies: linux_alt_patch_detect.nasl, redhat_repos.nasl, ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

Synopsis

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

Description

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:2735 advisory.

- kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

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

- kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)

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 RHEL 6 : kernel (RHSA-2021:2735) vulnerability:

GitHub: https://github.com/nanopathi/linux-4.19.72_CVE-2021-3347
[CVE-2021-3347]
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 [?]: II
STIG Risk Rating: Medium

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Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2021:2735. The text
# itself is copyright (C) Red Hat, Inc.
##

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

if (description)
{
  script_id(155787);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/12/03");

  script_cve_id("CVE-2020-12362", "CVE-2021-3347", "CVE-2021-33909");
  script_xref(name:"RHSA", value:"2021:2735");
  script_xref(name:"IAVA", value:"2021-A-0350");

  script_name(english:"RHEL 6 : kernel (RHSA-2021:2735)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2021:2735 advisory.

  - kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)

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

  - kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)

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://cwe.mitre.org/data/definitions/190.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/416.html");
  script_set_attribute(attribute:"see_also", value:"https://cwe.mitre.org/data/definitions/787.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2020-12362");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-3347");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/CVE-2021-33909");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2021:2735");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1922249");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1930246");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/1970273");
  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_cwe_id(190, 416, 787);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/01/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/07/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/12/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_els:6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:6.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-abi-whitelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-firmware");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

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

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

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');
include('rhel.inc');
include('ksplice.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) || 'Red Hat' >!< release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
var os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '6')) audit(AUDIT_OS_NOT, 'Red Hat 6.x', 'Red Hat ' + 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, 'Red Hat', cpu);

var repositories = {
    'enterprise_linux_6_client': [
      'rhel-6-desktop-debug-rpms',
      'rhel-6-desktop-fastrack-debug-rpms',
      'rhel-6-desktop-fastrack-rpms',
      'rhel-6-desktop-fastrack-source-rpms',
      'rhel-6-desktop-optional-debug-rpms',
      'rhel-6-desktop-optional-fastrack-debug-rpms',
      'rhel-6-desktop-optional-fastrack-rpms',
      'rhel-6-desktop-optional-fastrack-source-rpms',
      'rhel-6-desktop-optional-rpms',
      'rhel-6-desktop-optional-source-rpms',
      'rhel-6-desktop-rpms',
      'rhel-6-desktop-source-rpms'
    ],
    'enterprise_linux_6_computenode': [
      'rhel-6-for-hpc-node-fastrack-debug-rpms',
      'rhel-6-for-hpc-node-fastrack-rpms',
      'rhel-6-for-hpc-node-fastrack-source-rpms',
      'rhel-6-for-hpc-node-optional-fastrack-debug-rpms',
      'rhel-6-for-hpc-node-optional-fastrack-rpms',
      'rhel-6-for-hpc-node-optional-fastrack-source-rpms',
      'rhel-6-hpc-node-debug-rpms',
      'rhel-6-hpc-node-optional-debug-rpms',
      'rhel-6-hpc-node-optional-rpms',
      'rhel-6-hpc-node-optional-source-rpms',
      'rhel-6-hpc-node-rpms',
      'rhel-6-hpc-node-source-rpms',
      'rhel-hpc-node-6-eus-sfs-debug-rpms',
      'rhel-hpc-node-6-eus-sfs-source-rpms',
      'rhel-scalefs-for-rhel-6-hpc-node-debug-rpms',
      'rhel-scalefs-for-rhel-6-hpc-node-rpms',
      'rhel-scalefs-for-rhel-6-hpc-node-source-rpms'
    ],
    'enterprise_linux_6_server': [
      'rhel-6-for-system-z-debug-rpms',
      'rhel-6-for-system-z-fastrack-debug-rpms',
      'rhel-6-for-system-z-fastrack-rpms',
      'rhel-6-for-system-z-fastrack-source-rpms',
      'rhel-6-for-system-z-optional-debug-rpms',
      'rhel-6-for-system-z-optional-fastrack-debug-rpms',
      'rhel-6-for-system-z-optional-fastrack-rpms',
      'rhel-6-for-system-z-optional-fastrack-source-rpms',
      'rhel-6-for-system-z-optional-rpms',
      'rhel-6-for-system-z-optional-source-rpms',
      'rhel-6-for-system-z-rpms',
      'rhel-6-for-system-z-source-rpms',
      'rhel-6-server-debug-rpms',
      'rhel-6-server-fastrack-debug-rpms',
      'rhel-6-server-fastrack-rpms',
      'rhel-6-server-fastrack-source-rpms',
      'rhel-6-server-optional-debug-rpms',
      'rhel-6-server-optional-fastrack-debug-rpms',
      'rhel-6-server-optional-fastrack-rpms',
      'rhel-6-server-optional-fastrack-source-rpms',
      'rhel-6-server-optional-rpms',
      'rhel-6-server-optional-source-rpms',
      'rhel-6-server-rpms',
      'rhel-6-server-source-rpms',
      'rhel-ha-for-rhel-6-server-debug-rpms',
      'rhel-ha-for-rhel-6-server-rpms',
      'rhel-ha-for-rhel-6-server-source-rpms',
      'rhel-lb-for-rhel-6-server-debug-rpms',
      'rhel-lb-for-rhel-6-server-rpms',
      'rhel-lb-for-rhel-6-server-source-rpms',
      'rhel-rs-for-rhel-6-server-debug-rpms',
      'rhel-rs-for-rhel-6-server-rpms',
      'rhel-rs-for-rhel-6-server-source-rpms',
      'rhel-scalefs-for-rhel-6-server-debug-rpms',
      'rhel-scalefs-for-rhel-6-server-rpms',
      'rhel-scalefs-for-rhel-6-server-source-rpms'
    ],
    'enterprise_linux_6_workstation': [
      'rhel-6-workstation-debug-rpms',
      'rhel-6-workstation-fastrack-debug-rpms',
      'rhel-6-workstation-fastrack-rpms',
      'rhel-6-workstation-fastrack-source-rpms',
      'rhel-6-workstation-optional-debug-rpms',
      'rhel-6-workstation-optional-fastrack-debug-rpms',
      'rhel-6-workstation-optional-fastrack-rpms',
      'rhel-6-workstation-optional-fastrack-source-rpms',
      'rhel-6-workstation-optional-rpms',
      'rhel-6-workstation-optional-source-rpms',
      'rhel-6-workstation-rpms',
      'rhel-6-workstation-source-rpms',
      'rhel-scalefs-for-rhel-6-workstation-debug-rpms',
      'rhel-scalefs-for-rhel-6-workstation-rpms',
      'rhel-scalefs-for-rhel-6-workstation-source-rpms'
    ],
    'rhel_els_6': [
      'rhel-6-for-system-z-els-debug-rpms',
      'rhel-6-for-system-z-els-debug-rpms__s390x',
      'rhel-6-for-system-z-els-optional-debug-rpms',
      'rhel-6-for-system-z-els-optional-debug-rpms__s390x',
      'rhel-6-for-system-z-els-optional-rpms',
      'rhel-6-for-system-z-els-optional-rpms__s390x',
      'rhel-6-for-system-z-els-optional-source-rpms',
      'rhel-6-for-system-z-els-optional-source-rpms__s390x',
      'rhel-6-for-system-z-els-rpms',
      'rhel-6-for-system-z-els-rpms__s390x',
      'rhel-6-for-system-z-els-source-rpms',
      'rhel-6-for-system-z-els-source-rpms__s390x',
      'rhel-6-server-els-debug-rpms',
      'rhel-6-server-els-debug-rpms__i386',
      'rhel-6-server-els-debug-rpms__x86_64',
      'rhel-6-server-els-optional-debug-rpms',
      'rhel-6-server-els-optional-debug-rpms__i386',
      'rhel-6-server-els-optional-debug-rpms__x86_64',
      'rhel-6-server-els-optional-rpms',
      'rhel-6-server-els-optional-rpms__i386',
      'rhel-6-server-els-optional-rpms__x86_64',
      'rhel-6-server-els-optional-source-rpms',
      'rhel-6-server-els-optional-source-rpms__i386',
      'rhel-6-server-els-optional-source-rpms__x86_64',
      'rhel-6-server-els-rpms',
      'rhel-6-server-els-rpms__i386',
      'rhel-6-server-els-rpms__x86_64',
      'rhel-6-server-els-source-rpms',
      'rhel-6-server-els-source-rpms__i386',
      'rhel-6-server-els-source-rpms__x86_64'
    ],
    'rhel_extras_6': [
      'rhel-6-desktop-supplementary-debuginfo',
      'rhel-6-desktop-supplementary-rpms',
      'rhel-6-desktop-supplementary-source-rpms',
      'rhel-6-for-hpc-node-supplementary-debuginfo',
      'rhel-6-for-hpc-node-supplementary-rpms',
      'rhel-6-for-hpc-node-supplementary-source-rpms',
      'rhel-6-for-system-z-eus-supplementary-debuginfo',
      'rhel-6-for-system-z-eus-supplementary-rpms',
      'rhel-6-for-system-z-eus-supplementary-source-rpms',
      'rhel-6-for-system-z-supplementary-rpms',
      'rhel-6-for-system-z-supplementary-source-rpms',
      'rhel-6-server-aus-supplementary-debuginfo',
      'rhel-6-server-aus-supplementary-rpms',
      'rhel-6-server-aus-supplementary-source-rpms',
      'rhel-6-server-eus-supplementary-debuginfo',
      'rhel-6-server-eus-supplementary-rpms',
      'rhel-6-server-eus-supplementary-source-rpms',
      'rhel-6-server-supplementary-debuginfo',
      'rhel-6-server-supplementary-rpms',
      'rhel-6-server-supplementary-source-rpms',
      'rhel-6-workstation-supplementary-debuginfo',
      'rhel-6-workstation-supplementary-rpms',
      'rhel-6-workstation-supplementary-source-rpms',
      'rhel-hpc-node-6-eus-supplementary-debug-rpms',
      'rhel-hpc-node-6-eus-supplementary-rpms',
      'rhel-hpc-node-6-eus-supplementary-source-rpms'
    ],
    'rhel_extras_hpn_6': [
      'rhel-hpn-for-rhel-6-hpc-node-rpms',
      'rhel-hpn-for-rhel-6-server-rpms'
    ],
    'rhel_extras_oracle_java_6': [
      'rhel-6-desktop-restricted-maintenance-oracle-java-rpms',
      'rhel-6-for-hpc-node-restricted-maintenance-oracle-java-rpms',
      'rhel-6-server-aus-restricted-maintenance-oracle-java-rpms',
      'rhel-6-server-eus-restricted-maintenance-oracle-java-rpms',
      'rhel-6-server-restricted-maintenance-oracle-java-rpms',
      'rhel-6-workstation-restricted-maintenance-oracle-java-rpms',
      'rhel-hpc-node-6-eus-restricted-maintenance-oracle-java-rpms'
    ],
    'rhel_extras_sap_6': [
      'rhel-sap-for-rhel-6-for-system-z-debug-rpms',
      'rhel-sap-for-rhel-6-for-system-z-rpms',
      'rhel-sap-for-rhel-6-for-system-z-source-rpms',
      'rhel-sap-for-rhel-6-server-debug-rpms',
      'rhel-sap-for-rhel-6-server-eus-debug-rpms',
      'rhel-sap-for-rhel-6-server-eus-rpms',
      'rhel-sap-for-rhel-6-server-eus-source-rpms',
      'rhel-sap-for-rhel-6-server-rpms',
      'rhel-sap-for-rhel-6-server-source-rpms'
    ],
    'rhel_extras_sap_els_6': [
      'rhel-sap-for-rhel-6-for-system-z-els-debug-rpms',
      'rhel-sap-for-rhel-6-for-system-z-els-debug-rpms__s390x',
      'rhel-sap-for-rhel-6-for-system-z-els-rpms',
      'rhel-sap-for-rhel-6-for-system-z-els-rpms__s390x',
      'rhel-sap-for-rhel-6-for-system-z-els-source-rpms',
      'rhel-sap-for-rhel-6-for-system-z-els-source-rpms__s390x',
      'rhel-sap-for-rhel-6-server-els-debug-rpms',
      'rhel-sap-for-rhel-6-server-els-debug-rpms__x86_64',
      'rhel-sap-for-rhel-6-server-els-rpms',
      'rhel-sap-for-rhel-6-server-els-rpms__x86_64',
      'rhel-sap-for-rhel-6-server-els-source-rpms',
      'rhel-sap-for-rhel-6-server-els-source-rpms__x86_64'
    ],
    'rhel_extras_sap_hana_6': [
      'rhel-sap-hana-for-rhel-6-server-debug-rpms',
      'rhel-sap-hana-for-rhel-6-server-eus-debug-rpms',
      'rhel-sap-hana-for-rhel-6-server-eus-rpms',
      'rhel-sap-hana-for-rhel-6-server-rpms',
      'rhel-sap-hana-for-rhel-6-server-source-rpms'
    ],
    'rhel_extras_sap_hanna_els_6': [
      'rhel-sap-hana-for-rhel-6-server-els-debug-rpms',
      'rhel-sap-hana-for-rhel-6-server-els-debug-rpms__x86_64',
      'rhel-sap-hana-for-rhel-6-server-els-rpms',
      'rhel-sap-hana-for-rhel-6-server-els-rpms__x86_64',
      'rhel-sap-hana-for-rhel-6-server-els-source-rpms',
      'rhel-sap-hana-for-rhel-6-server-els-source-rpms__x86_64'
    ]
};

var repo_sets = rhel_get_valid_repo_sets(repositories:repositories);
var enterprise_linux_flag = rhel_repo_sets_has_enterprise_linux(repo_sets:repo_sets);
if(repo_sets == RHEL_REPOS_NO_OVERLAP_MESSAGE) audit(AUDIT_PACKAGE_LIST_MISSING, RHEL_REPO_AUDIT_PACKAGE_LIST_DETAILS);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  rm_kb_item(name:'Host/uptrack-uname-r');
  var cve_list = make_list('CVE-2020-12362', 'CVE-2021-3347', 'CVE-2021-33909');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for RHSA-2021:2735');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var pkgs = [
    {'reference':'kernel-2.6.32-754.41.2.el6', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-2.6.32-754.41.2.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-2.6.32-754.41.2.el6', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-abi-whitelists-2.6.32-754.41.2.el6', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-debug-2.6.32-754.41.2.el6', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-debug-2.6.32-754.41.2.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-debug-2.6.32-754.41.2.el6', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-debug-devel-2.6.32-754.41.2.el6', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-debug-devel-2.6.32-754.41.2.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-debug-devel-2.6.32-754.41.2.el6', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-devel-2.6.32-754.41.2.el6', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-devel-2.6.32-754.41.2.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-devel-2.6.32-754.41.2.el6', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-firmware-2.6.32-754.41.2.el6', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-kdump-2.6.32-754.41.2.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'kernel-kdump-devel-2.6.32-754.41.2.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'perf-2.6.32-754.41.2.el6', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'perf-2.6.32-754.41.2.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'perf-2.6.32-754.41.2.el6', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'python-perf-2.6.32-754.41.2.el6', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'python-perf-2.6.32-754.41.2.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']},
    {'reference':'python-perf-2.6.32-754.41.2.el6', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'repo_list':['enterprise_linux_6_client', 'enterprise_linux_6_computenode', 'enterprise_linux_6_server', 'enterprise_linux_6_workstation', 'rhel_els_6', 'rhel_extras_6', 'rhel_extras_hpn_6', 'rhel_extras_oracle_java_6', 'rhel_extras_sap_6', 'rhel_extras_sap_els_6', 'rhel_extras_sap_hana_6', 'rhel_extras_sap_hanna_els_6']}
];

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;
  var exists_check = NULL;
  var repo_list = NULL;
  if (!empty_or_null(package_array['repo_list'])) repo_list = package_array['repo_list'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = 'RHEL' + package_array['release'];
  if (!empty_or_null(package_array['sp']) && !enterprise_linux_flag) 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 &&
      (rhel_decide_repo_check(repo_list:repo_list, repo_sets:repo_sets) || (!exists_check || 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++;
}

if (flag)
{
  var extra = NULL;
  if (empty_or_null(repo_sets)) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get() + redhat_report_package_caveat();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'kernel / kernel-abi-whitelists / kernel-debug / kernel-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/redhat-RHSA-2021-2735.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\redhat-RHSA-2021-2735.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/redhat-RHSA-2021-2735.nasl

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How to Run

Here is how to run the RHEL 6 : kernel (RHSA-2021:2735) 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 Red Hat Local Security Checks plugin family.
On the right side table select RHEL 6 : kernel (RHSA-2021:2735) plugin ID 155787.
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 redhat-RHSA-2021-2735.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a redhat-RHSA-2021-2735.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - redhat-RHSA-2021-2735.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 redhat-RHSA-2021-2735.nasl -t <IP/HOST>

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References

RHSA | Red Hat Security Advisory:

2021:2735

IAVA | Information Assurance Vulnerability Alert:

2021-A-0350

CWE | Common Weakness Enumeration:

CWE-190 (Weakness) Integer Overflow or Wraparound
CWE-416 (Weakness) Use After Free
CWE-787 (Weakness) Out-of-bounds Write

See also:

Similar and related Nessus plugins:

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)
152912 - Oracle Linux 6 : kernel (ELSA-2021-9434)
152977 - RHEL 7 : kernel (RHSA-2021:3399)
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)
153148 - Debian DLA-2714-1 : linux-4.19 - LTS security update
153271 - EulerOS 2.0 SP2 : kernel (EulerOS-SA-2021-2392)
153370 - RHEL 7 : kpatch-patch (RHSA-2021:3523)
153371 - RHEL 7 : kernel (RHSA-2021:3522)
153610 - EulerOS 2.0 SP8 : kernel (EulerOS-SA-2021-2465)
153692 - EulerOS 2.0 SP5 : kernel (EulerOS-SA-2021-2502)
154000 - EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2569)
154001 - EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2570)
154404 - EulerOS 2.0 SP3 : kernel (EulerOS-SA-2021-2588)
155505 - EulerOS Virtualization 2.9.0 : kernel (EulerOS-SA-2021-2782)
155824 - openSUSE 15 Security Update : kernel (openSUSE-SU-2021:3876-1)
155840 - SUSE SLES15 Security Update : kernel (SUSE-SU-2021:3876-1)
156347 - EulerOS Virtualization 3.0.2.0 : kernel (EulerOS-SA-2021-2818)
156534 - EulerOS Virtualization 3.0.2.6 : kernel (EulerOS-SA-2021-2857)
157559 - AlmaLinux 8 : kernel (ALSA-2021:1093)
157560 - AlmaLinux 8 : kernel (ALSA-2021:2714)
157595 - AlmaLinux 8 : kernel (ALSA-2021:1578)
157817 - Rocky Linux 8 : kernel (RLSA-2021:2714)
158016 - EulerOS Virtualization 3.0.6.0 : kernel (EulerOS-SA-2022-1070)
158040 - EulerOS Virtualization 3.0.6.6 : kernel (EulerOS-SA-2022-1155)
160427 - Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-020)
160438 - Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-005)
160439 - Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-003)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file redhat-RHSA-2021-2735.nasl version 1.3. For more plugins, visit the Nessus Plugin Library.

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RHEL 6 : kernel (RHSA-2021:2735) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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