Debian dla-3474 : libnss-myhostname - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3474. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(177792);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/01/22");

  script_cve_id("CVE-2022-3821");

  script_name(english:"Debian dla-3474 : libnss-myhostname - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3474
advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-3474-1                [email protected]
    https://www.debian.org/lts/security/                          Adrian Bunk
    June 29, 2023                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : systemd
    Version        : 241-7~deb10u10
    CVE ID         : CVE-2022-3821
    Debian Bug     : 1021644

    A buffer overrun in format_timespan() has been fixed
    in systemd, the default init system in Debian.

    Additionally, fixes for getting property OnExternalPower via D-Bus
    and a memory leak on daemon-reload are also included.

    For Debian 10 buster, this problem has been fixed in version
    241-7~deb10u10.

    We recommend that you upgrade your systemd packages.

    For the detailed security status of systemd please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/systemd

    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

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://security-tracker.debian.org/tracker/source-package/systemd");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-3821");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/systemd");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libnss-myhostname packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C");
  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:N/I:N/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-2022-3821");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/11/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/06/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/06/30");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss-myhostname");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss-mymachines");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss-resolve");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnss-systemd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpam-systemd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsystemd-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libsystemd0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libudev-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libudev1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:systemd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:systemd-container");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:systemd-coredump");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:systemd-journal-remote");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:systemd-sysv");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:systemd-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:udev");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023-2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(10)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 10.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'libnss-myhostname', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'libnss-mymachines', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'libnss-resolve', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'libnss-systemd', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'libpam-systemd', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'libsystemd-dev', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'libsystemd0', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'libudev-dev', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'libudev1', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'systemd', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'systemd-container', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'systemd-coredump', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'systemd-journal-remote', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'systemd-sysv', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'systemd-tests', 'reference': '241-7~deb10u10'},
    {'release': '10.0', 'prefix': 'udev', 'reference': '241-7~deb10u10'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libnss-myhostname / libnss-mymachines / libnss-resolve / etc');
}