AlmaLinux 9 : systemd (ALSA-2023:0954)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2023:0954.
##

include('compat.inc');

if (description)
{
  script_id(172002);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/01");

  script_cve_id("CVE-2022-4415", "CVE-2022-45873");
  script_xref(name:"ALSA", value:"2023:0954");

  script_name(english:"AlmaLinux 9 : systemd (ALSA-2023:0954)");

  script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-2023:0954 advisory.

  - A vulnerability was found in systemd. This security flaw can cause a local information leak due to
    systemd-coredump not respecting the fs.suid_dumpable kernel setting. (CVE-2022-4415)

  - systemd 250 and 251 allows local users to achieve a systemd-coredump deadlock by triggering a crash that
    has a long backtrace. This occurs in parse_elf_object in shared/elf-util.c. The exploitation methodology
    is to crash a binary calling the same function recursively, and put it in a deeply nested directory to
    make its backtrace large enough to cause the deadlock. This must be done 16 times when MaxConnections=16
    is set for the systemd/units/systemd-coredump.socket file. (CVE-2022-45873)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://errata.almalinux.org/9/ALSA-2023-0954.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-4415");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(200, 833);

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/11/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/02/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/02/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-container");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-journal-remote");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-oomd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-pam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-resolved");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-rpm-macros");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:systemd-udev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::appstream");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::baseos");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 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('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/AlmaLinux/release');
if (isnull(os_release) || 'AlmaLinux' >!< os_release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
os_ver = os_ver[1];
if (! preg(pattern:"^9([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 9.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':'systemd-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-container-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-devel-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-journal-remote-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-libs-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-oomd-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-pam-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-resolved-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-rpm-macros-250-12.el9_1.3', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'systemd-udev-250-12.el9_1.3', 'release':'9', '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, 'systemd / systemd-container / systemd-devel / systemd-journal-remote / etc');
}