Debian dla-4630 : 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-4630. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(321085);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/03");

  script_cve_id(
    "CVE-2026-7383",
    "CVE-2026-9076",
    "CVE-2026-34180",
    "CVE-2026-42766",
    "CVE-2026-45447"
  );
  script_xref(name:"IAVA", value:"2026-A-0589");

  script_name(english:"Debian dla-4630 : 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-4630 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4630-1                [email protected]
    https://www.debian.org/lts/security/                     Arnaud Rebillout
    June 15, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : openssl
    Version        : 1.1.1w-0+deb11u8
    CVE ID         : CVE-2026-7383 CVE-2026-9076 CVE-2026-34180 CVE-2026-42766
                     CVE-2026-45447

    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-2026-7383

        A signed integer overflow when sizing the destination buffer for
        Unicode output in ASN1_mbstring_ncopy() can lead to a heap buffer
        overflow.

    CVE-2026-9076

        When CMS password-based decryption (RFC 3211 / PWRI key unwrap)
        processes attacker-supplied CMS data, an attacker-chosen stream-mode
        KEK cipher can trigger a heap out-of-bounds read in kek_unwrap_key().

    CVE-2026-34180

        Parsing a crafted DER-encoded ASN.1 structure with a primitive element
        whose content exceeds 2 gigabytes in length may cause a heap buffer
        over-read on 64-bit Unix and Unix-like platforms.

    CVE-2026-42766

        A specially crafted password-encrypted CMS message can trigger a NULL
        pointer dereference during CMS decryption.

    CVE-2026-45447

        A specially crafted PKCS#7 or S/MIME signed message could trigger a
        use-after-free during PKCS#7 signature verification.

    For Debian 11 bullseye, these problems have been fixed in version
    1.1.1w-0+deb11u8.

    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-2026-34180");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-42766");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-45447");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-7383");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-9076");
  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:L/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-2026-45447");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-7383");

  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:"2026/06/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/15");

  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) 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+deb11u8'},
    {'release': '11.0', 'prefix': 'libssl-dev', 'reference': '1.1.1w-0+deb11u8'},
    {'release': '11.0', 'prefix': 'libssl-doc', 'reference': '1.1.1w-0+deb11u8'},
    {'release': '11.0', 'prefix': 'libssl1.1', 'reference': '1.1.1w-0+deb11u8'},
    {'release': '11.0', 'prefix': 'libssl1.1-udeb', 'reference': '1.1.1w-0+deb11u8'},
    {'release': '11.0', 'prefix': 'openssl', 'reference': '1.1.1w-0+deb11u8'}
];

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');
}