AlmaLinux 8 : rpm (ALSA-2022:0368)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2022:0368.
##

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

if (description)
{
  script_id(158835);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/03/21");

  script_cve_id("CVE-2021-3521");
  script_xref(name:"ALSA", value:"2022:0368");

  script_name(english:"AlmaLinux 8 : rpm (ALSA-2022:0368)");

  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-2022:0368 advisory.

  - There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a
    binding signature. RPM does not check the binding signature of subkeys prior to importing them. If an
    attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate
    public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data
    integrity. To exploit this flaw, an attacker must either compromise an RPM repository or convince an
    administrator to install an untrusted RPM or public key. It is strongly recommended to only use RPMs and
    public keys from trusted sources. (CVE-2021-3521)

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-2022-0368.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/C:N/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3521");

  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:"2022/02/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python3-rpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-apidocs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-build");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-build-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-cron");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-plugin-fapolicyd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-plugin-ima");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-plugin-prioreset");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-plugin-selinux");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-plugin-syslog");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-plugin-systemd-inhibit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:rpm-sign");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:8");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 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 pkgs = [
    {'reference':'python3-rpm-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-apidocs-4.14.3-19.el8_5.2', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-build-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-build-libs-4.14.3-19.el8_5.2', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-build-libs-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-cron-4.14.3-19.el8_5.2', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-devel-4.14.3-19.el8_5.2', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-devel-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-libs-4.14.3-19.el8_5.2', 'cpu':'i686', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-libs-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-fapolicyd-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-ima-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-prioreset-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-selinux-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-syslog-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-plugin-systemd-inhibit-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'rpm-sign-4.14.3-19.el8_5.2', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
];

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 = '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 (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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, 'python3-rpm / rpm / rpm-apidocs / rpm-build / rpm-build-libs / etc');
}