Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : Lasso vulnerabilities (USN-7872-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7872-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(275817);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/19");

  script_cve_id(
    "CVE-2025-46404",
    "CVE-2025-46705",
    "CVE-2025-46784",
    "CVE-2025-47151"
  );
  script_xref(name:"USN", value:"7872-1");

  script_name(english:"Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : Lasso vulnerabilities (USN-7872-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-7872-1 advisory.

    It was discovered that Lasso incorrectly handled certain malformed SAML responses. A remote attacker could
    possibly use this issue to cause Lasso to crash, resulting in a denial of service. (CVE-2025-46404)

    It was discovered that Lasso incorrectly handled certain malformed SAML assertion responses. A remote
    attacker could possibly use this issue to cause Lasso to crash, resulting in a denial of service.
    (CVE-2025-46705)

    It was discovered that Lasso incorrectly handled certain malformed SAML responses. A remote attacker could
    possibly use this issue to cause Lasso to consume memory, resulting in a denial of service. This issue
    only affected Ubuntu 22.04 LTS. (CVE-2025-46784)

    It was discovered that Lasso incorrectly handled certain malformed SAML responses. A remote attacker could
    use this issue to cause Lasso to crash, resulting in a denial of service, or possibly execute arbitrary
    code. (CVE-2025-47151)

Tenable has extracted the preceding description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-7872-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected 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:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-47151");

  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:"2025/11/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/11/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblasso-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblasso3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblasso3-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblasso3t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-lasso");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2025 Canonical, Inc. / NASL script (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('22.04' >< os_release || '24.04' >< os_release || '25.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 24.04 / 25.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '22.04', 'pkgname': 'liblasso-perl', 'pkgver': '2.7.0-2ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-46784', 'CVE-2025-47151']},
    {'osver': '22.04', 'pkgname': 'liblasso3', 'pkgver': '2.7.0-2ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-46784', 'CVE-2025-47151']},
    {'osver': '22.04', 'pkgname': 'liblasso3-dev', 'pkgver': '2.7.0-2ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-46784', 'CVE-2025-47151']},
    {'osver': '22.04', 'pkgname': 'python3-lasso', 'pkgver': '2.7.0-2ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-46784', 'CVE-2025-47151']},
    {'osver': '24.04', 'pkgname': 'liblasso-perl', 'pkgver': '2.8.2-2ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-47151']},
    {'osver': '24.04', 'pkgname': 'liblasso3-dev', 'pkgver': '2.8.2-2ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-47151']},
    {'osver': '24.04', 'pkgname': 'liblasso3t64', 'pkgver': '2.8.2-2ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-47151']},
    {'osver': '24.04', 'pkgname': 'python3-lasso', 'pkgver': '2.8.2-2ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-47151']},
    {'osver': '25.04', 'pkgname': 'liblasso-perl', 'pkgver': '2.8.2-8ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-47151']},
    {'osver': '25.04', 'pkgname': 'liblasso3-dev', 'pkgver': '2.8.2-8ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-47151']},
    {'osver': '25.04', 'pkgname': 'liblasso3t64', 'pkgver': '2.8.2-8ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-47151']},
    {'osver': '25.04', 'pkgname': 'python3-lasso', 'pkgver': '2.8.2-8ubuntu0.1', 'cves': ['CVE-2025-46404', 'CVE-2025-46705', 'CVE-2025-47151']}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'liblasso-perl / liblasso3 / liblasso3-dev / liblasso3t64 / etc');
}