Debian dla-4063 : gnutls-bin - 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-4063. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(216622);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/02/21");

  script_cve_id("CVE-2024-12243");

  script_name(english:"Debian dla-4063 : gnutls-bin - 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 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4063
advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4063-1                [email protected]
    https://www.debian.org/lts/security/                       Guilhem Moulin
    February 21, 2025                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : gnutls28
    Version        : 3.7.1-5+deb11u7
    CVE ID         : CVE-2024-12243

    Bing Shi discovered that GnuTLS, a portable library which implements
    the Transport Layer Security and Datagram Transport Layer Security
    protocols, had inefficient handling of certificate data with a large
    number of names or name constraints, potentially leading to Denial of
    Service upon specially crafted certificates.

    For Debian 11 bullseye, this problem has been fixed in version
    3.7.1-5+deb11u7.

    We recommend that you upgrade your gnutls28 packages.

    For the detailed security status of gnutls28 please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/gnutls28

    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
    Attachment:
    signature.asc
    Description: PGP signature

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/gnutls28");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-12243");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/gnutls28");
  script_set_attribute(attribute:"solution", value:
"Upgrade the gnutls-bin packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-12243");

  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:"2025/02/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/02/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/02/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:gnutls-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:gnutls-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:guile-gnutls");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgnutls-dane0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgnutls-openssl27");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgnutls28-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgnutls30");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgnutlsxx28");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  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) 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:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', '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': '11.0', 'prefix': 'gnutls-bin', 'reference': '3.7.1-5+deb11u7'},
    {'release': '11.0', 'prefix': 'gnutls-doc', 'reference': '3.7.1-5+deb11u7'},
    {'release': '11.0', 'prefix': 'guile-gnutls', 'reference': '3.7.1-5+deb11u7'},
    {'release': '11.0', 'prefix': 'libgnutls-dane0', 'reference': '3.7.1-5+deb11u7'},
    {'release': '11.0', 'prefix': 'libgnutls-openssl27', 'reference': '3.7.1-5+deb11u7'},
    {'release': '11.0', 'prefix': 'libgnutls28-dev', 'reference': '3.7.1-5+deb11u7'},
    {'release': '11.0', 'prefix': 'libgnutls30', 'reference': '3.7.1-5+deb11u7'},
    {'release': '11.0', 'prefix': 'libgnutlsxx28', 'reference': '3.7.1-5+deb11u7'}
];

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, 'gnutls-bin / gnutls-doc / guile-gnutls / libgnutls-dane0 / etc');
}