Debian dla-3875 : 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-3875. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(206640);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/05");

  script_cve_id("CVE-2024-28834", "CVE-2024-28835");

  script_name(english:"Debian dla-3875 : 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 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-3875 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-3875-1                [email protected]
    https://www.debian.org/lts/security/                       Guilhem Moulin
    September 05, 2024                            https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : gnutls28
    Version        : 3.7.1-5+deb11u6
    CVE ID         : CVE-2024-28834 CVE-2024-28835
    Debian Bug     : 1067463 1067464

    Vulnerabilities have been found in GnuTLS, which could lead to
    information disclosure or Denial of Service.

    CVE-2024-28834

        Hubert Kario and George Pantelakis discovered that GnuTLS was
        vulnerable to a side-channel attack known as the Minerva attack.
        In specific scenarios, such as when using the
        GNUTLS_PRIVKEY_FLAG_REPRODUCIBLE flag, the deterministic ECDSA code
        leaks bit-length of random nonce which allows for full recovery of
        the private key used after observing a few hundreds to a few
        thousands of signatures on known messages.

    CVE-2024-28835

        It was discovered attempting to verify a specially crafted .pem
        bundle using the `certtool --verify-chain` command could yield an
        application clash.

    For Debian 11 bullseye, these problems have been fixed in version
    3.7.1-5+deb11u6.

    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 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-2024-28834");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-28835");
  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:H/Au:S/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/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-2024-28834");

  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:"2024/03/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/09/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/09/05");

  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) 2024 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+deb11u6'},
    {'release': '11.0', 'prefix': 'gnutls-doc', 'reference': '3.7.1-5+deb11u6'},
    {'release': '11.0', 'prefix': 'guile-gnutls', 'reference': '3.7.1-5+deb11u6'},
    {'release': '11.0', 'prefix': 'libgnutls-dane0', 'reference': '3.7.1-5+deb11u6'},
    {'release': '11.0', 'prefix': 'libgnutls-openssl27', 'reference': '3.7.1-5+deb11u6'},
    {'release': '11.0', 'prefix': 'libgnutls28-dev', 'reference': '3.7.1-5+deb11u6'},
    {'release': '11.0', 'prefix': 'libgnutls30', 'reference': '3.7.1-5+deb11u6'},
    {'release': '11.0', 'prefix': 'libgnutlsxx28', 'reference': '3.7.1-5+deb11u6'}
];

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');
}