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nessusThis script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.REDHAT-RHSA-2021-4035.NASL
HistoryNov 02, 2021 - 12:00 a.m.

RHEL 7 : binutils (RHSA-2021:4035)

2021-11-0200:00:00
This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
137

5.1 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:H/Au:N/C:P/I:P/A:P

8.3 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

8.6 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

65.5%

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:4035 advisory.

  • Developer environment: Unicode’s bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574)

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

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2021:4035. The text
# itself is copyright (C) Red Hat, Inc.
##

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

if (description)
{
  script_id(154830);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/28");

  script_cve_id("CVE-2021-42574");
  script_xref(name:"RHSA", value:"2021:4035");
  script_xref(name:"IAVA", value:"2021-A-0528");

  script_name(english:"RHEL 7 : binutils (RHSA-2021:4035)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update for binutils.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2021:4035 advisory.

  - Developer environment: Unicode's bidirectional (BiDi) override characters can cause trojan source attacks
    (CVE-2021-42574)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2021/rhsa-2021_4035.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ac09d99d");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#moderate");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/vulnerabilities/RHSB-2021-007");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2021:4035");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2005819");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL binutils package based on the guidance in RHSA-2021:4035.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-42574");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(838);
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/11/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/11/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_aus:7.6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:7.6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_tus:7.6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:binutils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:binutils-devel");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'eq', os_version: os_ver, rhel_version: '7.6')) audit(AUDIT_OS_NOT, 'Red Hat 7.6', '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 && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'repo_relative_urls': [
      'content/aus/rhel/server/7/7.6/x86_64/debug',
      'content/aus/rhel/server/7/7.6/x86_64/optional/debug',
      'content/aus/rhel/server/7/7.6/x86_64/optional/os',
      'content/aus/rhel/server/7/7.6/x86_64/optional/source/SRPMS',
      'content/aus/rhel/server/7/7.6/x86_64/os',
      'content/aus/rhel/server/7/7.6/x86_64/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/debug',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/highavailability/debug',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/highavailability/os',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/highavailability/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/optional/debug',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/optional/os',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/optional/source/SRPMS',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/os',
      'content/e4s/rhel/power-le/7/7.6/ppc64le/source/SRPMS',
      'content/e4s/rhel/server/7/7.6/x86_64/debug',
      'content/e4s/rhel/server/7/7.6/x86_64/highavailability/debug',
      'content/e4s/rhel/server/7/7.6/x86_64/highavailability/os',
      'content/e4s/rhel/server/7/7.6/x86_64/highavailability/source/SRPMS',
      'content/e4s/rhel/server/7/7.6/x86_64/optional/debug',
      'content/e4s/rhel/server/7/7.6/x86_64/optional/os',
      'content/e4s/rhel/server/7/7.6/x86_64/optional/source/SRPMS',
      'content/e4s/rhel/server/7/7.6/x86_64/os',
      'content/e4s/rhel/server/7/7.6/x86_64/source/SRPMS',
      'content/tus/rhel/server/7/7.6/x86_64/debug',
      'content/tus/rhel/server/7/7.6/x86_64/highavailability/debug',
      'content/tus/rhel/server/7/7.6/x86_64/highavailability/os',
      'content/tus/rhel/server/7/7.6/x86_64/highavailability/source/SRPMS',
      'content/tus/rhel/server/7/7.6/x86_64/optional/debug',
      'content/tus/rhel/server/7/7.6/x86_64/optional/os',
      'content/tus/rhel/server/7/7.6/x86_64/optional/source/SRPMS',
      'content/tus/rhel/server/7/7.6/x86_64/os',
      'content/tus/rhel/server/7/7.6/x86_64/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'binutils-2.27-34.base.el7_6.4', 'sp':'6', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'binutils-2.27-34.base.el7_6.4', 'sp':'6', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'binutils-devel-2.27-34.base.el7_6.4', 'sp':'6', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'binutils-devel-2.27-34.base.el7_6.4', 'sp':'6', 'cpu':'ppc64le', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'binutils-devel-2.27-34.base.el7_6.4', 'sp':'6', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_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 cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!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, cves:cves)) flag++;
  }
}

if (flag)
{
  var subscription_caveat = '\n' +
    'NOTE: This vulnerability check contains fixes that apply to\n' +
    'packages only available in the Red Hat Enterprise Linux\n' +
    'Advanced Update Support, Telco Extended Update Support or Update Services for SAP Solutions repositories.\n' +
    'Access to these repositories requires a paid RHEL subscription.\n';
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = subscription_caveat + rpm_report_get() + redhat_report_repo_caveat();
  else extra = subscription_caveat + rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'binutils / binutils-devel');
}
VendorProductVersionCPE
redhatrhel_aus7.6cpe:/o:redhat:rhel_aus:7.6
redhatrhel_e4s7.6cpe:/o:redhat:rhel_e4s:7.6
redhatrhel_tus7.6cpe:/o:redhat:rhel_tus:7.6
redhatenterprise_linuxbinutilsp-cpe:/a:redhat:enterprise_linux:binutils
redhatenterprise_linuxbinutils-develp-cpe:/a:redhat:enterprise_linux:binutils-devel

5.1 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:H/Au:N/C:P/I:P/A:P

8.3 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

8.6 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

65.5%