Debian dsa-6140 : 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 dsa-6140. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(299381);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/18");

  script_cve_id("CVE-2025-9820", "CVE-2025-14831");

  script_name(english:"Debian dsa-6140 : gnutls-bin - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-6140 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-6140-1                   [email protected]
    https://www.debian.org/security/                     Salvatore Bonaccorso
    February 18, 2026                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : gnutls28
    CVE ID         : CVE-2025-14831

    Tim Scheckenbach reported a flaw in GnuTLS, a library implementing the
    TLS and SSL protocols. Processing of specially crafted certificates
    containing a large number of name constraints may result in denial of
    service (resource exhaustion).

    For the oldstable distribution (bookworm), this problem has been fixed
    in version 3.7.9-2+deb12u6. This update also includes a fix for
    CVE-2025-9820.

    For the stable distribution (trixie), this problem has been fixed in
    version 3.8.9-3+deb13u2.

    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 Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/

    Mailing list: [email protected]

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

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://security-tracker.debian.org/tracker/source-package/gnutls28");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-14831");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-9820");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/gnutls28");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/trixie/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-2025-14831");

  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:"2025/11/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/18");

  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-dane0t64");
  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:libgnutls-openssl27t64");
  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:libgnutls30t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgnutlsxx30");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  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) 2026 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:"^(12)\.[0-9]+|^(13)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0 / 13.0', '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': '12.0', 'prefix': 'gnutls-bin', 'reference': '3.7.9-2+deb12u6'},
    {'release': '12.0', 'prefix': 'gnutls-doc', 'reference': '3.7.9-2+deb12u6'},
    {'release': '12.0', 'prefix': 'guile-gnutls', 'reference': '3.7.9-2+deb12u6'},
    {'release': '12.0', 'prefix': 'libgnutls-dane0', 'reference': '3.7.9-2+deb12u6'},
    {'release': '12.0', 'prefix': 'libgnutls-openssl27', 'reference': '3.7.9-2+deb12u6'},
    {'release': '12.0', 'prefix': 'libgnutls28-dev', 'reference': '3.7.9-2+deb12u6'},
    {'release': '12.0', 'prefix': 'libgnutls30', 'reference': '3.7.9-2+deb12u6'},
    {'release': '12.0', 'prefix': 'libgnutlsxx30', 'reference': '3.7.9-2+deb12u6'},
    {'release': '13.0', 'prefix': 'gnutls-bin', 'reference': '3.8.9-3+deb13u2'},
    {'release': '13.0', 'prefix': 'gnutls-doc', 'reference': '3.8.9-3+deb13u2'},
    {'release': '13.0', 'prefix': 'libgnutls-dane0t64', 'reference': '3.8.9-3+deb13u2'},
    {'release': '13.0', 'prefix': 'libgnutls-openssl27t64', 'reference': '3.8.9-3+deb13u2'},
    {'release': '13.0', 'prefix': 'libgnutls28-dev', 'reference': '3.8.9-3+deb13u2'},
    {'release': '13.0', 'prefix': 'libgnutls30t64', 'reference': '3.8.9-3+deb13u2'}
];

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');
}