Debian dla-4624 : 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-4624. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(320023);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/09");

  script_cve_id(
    "CVE-2026-28387",
    "CVE-2026-28388",
    "CVE-2026-28389",
    "CVE-2026-28390"
  );
  script_xref(name:"IAVA", value:"2026-A-0308");

  script_name(english:"Debian dla-4624 : 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-4624 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4624-1                [email protected]
    https://www.debian.org/lts/security/                     Arnaud Rebillout
    June 09, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : openssl
    Version        : 1.1.1w-0+deb11u7
    CVE ID         : CVE-2026-28387 CVE-2026-28388 CVE-2026-28389 CVE-2026-28390

    Several vulnerabilities have been discovered in OpenSSL, a Secure Socket
    Layer toolkit providing the SSL and TLS cryptographic protocols for secure
    communication over the Internet.

    CVE-2026-28387

        An uncommon configuration of clients performing DANE TLSA-based server
        authentication, when paired with uncommon server DANE TLSA records,
        may result in a use-after-free and/or double-free on the client side.

    CVE-2026-28388

        When a delta CRL that contains a Delta CRL Indicator extension is
        processed a NULL pointer dereference might happen if the required CRL
        Number extension is missing.

    CVE-2026-28389

        During processing of a crafted CMS EnvelopedData message with
        KeyAgreeRecipientInfo a NULL pointer dereference can happen.

    CVE-2026-28390

        During processing of a crafted CMS EnvelopedData message with
        KeyTransportRecipientInfo a NULL pointer dereference can happen.

    For Debian 11 bullseye, these problems have been fixed in version
    1.1.1w-0+deb11u7.

    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

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-2026-28387");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-28388");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-28389");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-28390");
  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:C/I:C/A:C");
  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:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-28387");

  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:"2024/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/09");

  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:"II");
  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:"^(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': '1.1.1w-0+deb11u7'},
    {'release': '11.0', 'prefix': 'libssl-dev', 'reference': '1.1.1w-0+deb11u7'},
    {'release': '11.0', 'prefix': 'libssl-doc', 'reference': '1.1.1w-0+deb11u7'},
    {'release': '11.0', 'prefix': 'libssl1.1', 'reference': '1.1.1w-0+deb11u7'},
    {'release': '11.0', 'prefix': 'libssl1.1-udeb', 'reference': '1.1.1w-0+deb11u7'},
    {'release': '11.0', 'prefix': 'openssl', 'reference': '1.1.1w-0+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_HOLE,
    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');
}