Debian dla-3942 : libcrypto1.1-udeb - 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-3942. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(209978);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/04/14");

  script_cve_id(
    "CVE-2023-5678",
    "CVE-2024-0727",
    "CVE-2024-2511",
    "CVE-2024-4741",
    "CVE-2024-5535",
    "CVE-2024-9143"
  );
  script_xref(name:"IAVA", value:"2024-A-0121-S");
  script_xref(name:"IAVA", value:"2024-A-0208-S");
  script_xref(name:"IAVA", value:"2024-A-0321-S");

  script_name(english:"Debian dla-3942 : libcrypto1.1-udeb - 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-3942 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-3942-1                [email protected]
    https://www.debian.org/lts/security/                         Sean Whitton
    October 31, 2024                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : openssl
    Version        : 1.1.1n-0+deb11u6
    CVE ID         : CVE-2023-5678 CVE-2024-0727 CVE-2024-2511 CVE-2024-4741
                     CVE-2024-5535 CVE-2024-9143
    Debian Bug     : 1055473 1061582 1068658 1072113 1074487 1085378

    Multiple vulnerabilities were discovered in OpenSSL, the Secure Sockets
    Layer toolkit.

    CVE-2023-5678

        A denial of service could occur with excessively long X9.42 DH keys.

    CVE-2024-0727

        A denial of service could occur with a null field in a PKCS12 file.

    CVE-2024-2511

        A denial of service could occur when the SSL_OP_NO_TICKET flag is
        set, with TLSv1.3.

    CVE-2024-4741

        A use-after-free problem was found in the SSL_free_buffers function.

    CVE-2024-5535

        Calling the OpenSSL API function SSL_select_next_proto with an empty
        supported client protocols buffer may cause a crash or memory
        contents to be sent to the peer.

    CVE-2024-9143

        Use of the low-level GF(2^m) elliptic curve APIs with untrusted
        explicit values for the field polynomial can lead to out-of-bounds
        memory reads or writes.  This could lead to information disclosure
        or possibly remote code execution.

    For Debian 11 bullseye, these problems have been fixed in version
    1.1.1n-0+deb11u6.

    We recommend that you upgrade your openssl packages.

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

    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/openssl");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-5678");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-0727");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-2511");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-4741");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-5535");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-9143");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/openssl");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libcrypto1.1-udeb packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/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:N/UI:R/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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-9143");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2024-0727");

  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:"2023/11/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/10/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/10/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libcrypto1.1-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libssl-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libssl-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libssl1.1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libssl1.1-udeb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openssl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2024-2025 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': 'libcrypto1.1-udeb', 'reference': '1.1.1n-0+deb11u6'},
    {'release': '11.0', 'prefix': 'libssl-dev', 'reference': '1.1.1n-0+deb11u6'},
    {'release': '11.0', 'prefix': 'libssl-doc', 'reference': '1.1.1n-0+deb11u6'},
    {'release': '11.0', 'prefix': 'libssl1.1', 'reference': '1.1.1n-0+deb11u6'},
    {'release': '11.0', 'prefix': 'libssl1.1-udeb', 'reference': '1.1.1n-0+deb11u6'},
    {'release': '11.0', 'prefix': 'openssl', 'reference': '1.1.1n-0+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, 'libcrypto1.1-udeb / libssl-dev / libssl-doc / libssl1.1 / etc');
}