Debian dla-4813 : iscsiuio - 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-4813. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(362657);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/02");

  script_cve_id(
    "CVE-2026-18724",
    "CVE-2026-18725",
    "CVE-2026-18726",
    "CVE-2026-18727",
    "CVE-2026-18728",
    "CVE-2026-44943",
    "CVE-2026-44944"
  );

  script_name(english:"Debian dla-4813 : iscsiuio - 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 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4813 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4813-1                [email protected]
    https://www.debian.org/lts/security/                       Daniel Leidert
    October 02, 2026                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : open-iscsi
    Version        : 2.1.8-1+deb12u1
    CVE ID         : CVE-2026-18724 CVE-2026-18725 CVE-2026-18726 CVE-2026-18727
                     CVE-2026-18728 CVE-2026-44943 CVE-2026-44944
    Debian Bug     : 1143059 1144935

    Multiple vulnerabilities were found in open-iscsi, a high-performance,
    transport independent, multi-platform implementation of RFC3720 iSCSI.

    CVE-2026-18724

       A stack buffer overflow exists in idbm_recinfo_config.

    CVE-2026-18725

       An out-of-bounds access exists in the IPv6 ICMPv6 echo handling.

    CVE-2026-18726

       Multiple vulnerabilities exist in the ICMPv6 Router Advertisement
       option parsing.

    CVE-2026-18727

       An integer underflow exists in the iscsiuio DHCPv6 parsing.

    CVE-2026-18728

       An integer underflow exists in the iscsiuio IPv4 DHCP parsing.

    CVE-2026-44943

       Improve iscsid discovery handling of IQN names.

    CVE-2026-44944

       An unprivilidged local user can use the isscsiuio control socket.

    For Debian 12 bookworm, these problems have been fixed in version
    2.1.8-1+deb12u1.

    We recommend that you upgrade your open-iscsi packages.

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

    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: This is a digitally signed message part

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/open-iscsi");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-18724");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-18725");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-18726");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-18727");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-18728");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-44943");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-44944");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/open-iscsi");
  script_set_attribute(attribute:"solution", value:
"Upgrade the iscsiuio packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-44943");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-18728");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-44944");

  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:"2026/07/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:iscsiuio");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libopeniscsiusr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libopeniscsiusr-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:open-iscsi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:open-iscsi-udeb");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  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]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0', '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': 'iscsiuio', 'reference': '2.1.8-1+deb12u1'},
    {'release': '12.0', 'prefix': 'libopeniscsiusr', 'reference': '2.1.8-1+deb12u1'},
    {'release': '12.0', 'prefix': 'libopeniscsiusr-dev', 'reference': '2.1.8-1+deb12u1'},
    {'release': '12.0', 'prefix': 'open-iscsi', 'reference': '2.1.8-1+deb12u1'},
    {'release': '12.0', 'prefix': 'open-iscsi-udeb', 'reference': '2.1.8-1+deb12u1'}
];

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, 'iscsiuio / libopeniscsiusr / libopeniscsiusr-dev / open-iscsi / etc');
}