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nessusThis script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.ALMA_LINUX_ALSA-2021-2583.NASL
HistoryFeb 09, 2022 - 12:00 a.m.

AlmaLinux 8 : python38:3.8 and python38-devel:3.8 (ALSA-2021:2583)

2022-02-0900:00:00
This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
22

10 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.006 Low

EPSS

Percentile

77.9%

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2021:2583 advisory.

  • A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747. (CVE-2020-14343)

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 Network Security, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2021:2583.
##

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

if (description)
{
  script_id(157659);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/14");

  script_cve_id("CVE-2020-14343");
  script_xref(name:"ALSA", value:"2021:2583");
  script_xref(name:"IAVA", value:"2021-A-0463");

  script_name(english:"AlmaLinux 8 : python38:3.8 and python38-devel:3.8 (ALSA-2021:2583)");

  script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the
ALSA-2021:2583 advisory.

  - A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to
    arbitrary code execution when it processes untrusted YAML files through the full_load method or with the
    FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this
    flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the
    python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747. (CVE-2020-14343)

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://errata.almalinux.org/8/ALSA-2021-2583.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/AC:L/PR:N/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-2020-14343");

  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:"2021/01/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-atomicwrites");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-attrs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-more-itertools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-packaging");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-pluggy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-py");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-pyparsing");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-pytest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python38-wcwidth");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Alma 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/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");

  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/AlmaLinux/release');
if (isnull(release) || 'AlmaLinux' >!< release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
var os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 8.x', 'AlmaLinux ' + os_ver);

if (!get_kb_item('Host/AlmaLinux/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, 'AlmaLinux', cpu);

var module_ver = get_kb_item('Host/AlmaLinux/appstream/python38-devel');
if (isnull(module_ver)) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module python38-devel:3.8');
if ('3.8' >!< module_ver) audit(AUDIT_PACKAGE_NOT_AFFECTED, 'Module python38-devel:' + module_ver);

var appstreams = {
    'python38-devel:3.8': [
      {'reference':'python38-atomicwrites-1.3.0-8.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python38-attrs-19.3.0-3.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python38-more-itertools-7.2.0-5.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python38-packaging-19.2-3.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python38-pluggy-0.13.0-3.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python38-py-1.8.0-8.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python38-pyparsing-2.4.5-3.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python38-pytest-4.6.6-3.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'python38-wcwidth-0.1.7-16.module_el8.4.0+2510+cb4d423d', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
    ]
};

var flag = 0;
var appstreams_found = 0;
foreach module (keys(appstreams)) {
  var appstream = NULL;
  var appstream_name = NULL;
  var appstream_version = NULL;
  var appstream_split = split(module, sep:':', keep:FALSE);
  if (!empty_or_null(appstream_split)) {
    appstream_name = appstream_split[0];
    appstream_version = appstream_split[1];
    if (!empty_or_null(appstream_name)) appstream = get_one_kb_item('Host/AlmaLinux/appstream/' + appstream_name);
  }
  if (!empty_or_null(appstream) && appstream_version == appstream || appstream_name == 'all') {
    appstreams_found++;
    foreach package_array ( appstreams[module] ) {
      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 = 'Alma-' + 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 && (!exists_check || rpm_exists(release:release, rpm:exists_check))) {
        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 (!appstreams_found) audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Module python38-devel:3.8');

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, 'python38-atomicwrites / python38-attrs / python38-more-itertools / etc');
}
VendorProductVersionCPE
almalinuxpython38-atomicwritesp-cpe:/a:alma:linux:python38-atomicwrites
almalinuxpython38-attrsp-cpe:/a:alma:linux:python38-attrs
almalinuxpython38-more-itertoolsp-cpe:/a:alma:linux:python38-more-itertools
almalinuxpython38-packagingp-cpe:/a:alma:linux:python38-packaging
almalinuxpython38-pluggyp-cpe:/a:alma:linux:python38-pluggy
almalinuxpython38-pyp-cpe:/a:alma:linux:python38-py
almalinuxpython38-pyparsingp-cpe:/a:alma:linux:python38-pyparsing
almalinuxpython38-pytestp-cpe:/a:alma:linux:python38-pytest
almalinuxpython38-wcwidthp-cpe:/a:alma:linux:python38-wcwidth
almalinux8cpe:/o:alma:linux:8

10 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.006 Low

EPSS

Percentile

77.9%