Debian dla-4797 : lemonldap-ng - 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-4797. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(350782);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/26");

  script_cve_id("CVE-2026-95811");

  script_name(english:"Debian dla-4797 : lemonldap-ng - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dla-4797
advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4797-1                [email protected]
    https://www.debian.org/lts/security/                       Xavier Guimard
    September 26, 2026                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : lemonldap-ng
    Version        : 2.16.1+ds-deb12u10
    CVE ID         : CVE-2026-95811

    Several vulnerabilities have been fixed in lemonldap-ng, a Web-SSO system.

    CVE-2026-95811

        Access rules (locationRules) were tested against the raw request URI
        whereas web servers route on the decoded and normalized path. An
        attacker could bypass some admin interface access rules using
        percent-encoded characters or dot-segments in URLs (not the default
        rule).

    Additionally, the following issues have been fixed:

      * Request parameters sent several times could inject arbitrary keys
        in internal data structures (RESTProxy/SOAP data, spoofId,
        templates).
      * When checking access to another virtual host (menu, REST/SOAP
        authorizationfor, CheckUser), the authentication level of the
        current virtual host was used instead of the target one.
      * With browsersDontStorePassword, passwords typed in portal forms
        could be displayed in clear text.

    For Debian 12 bookworm, these problems have been fixed in version
    2.16.1+ds-deb12u10.

    We recommend that you upgrade your lemonldap-ng packages.

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

    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 this issue but has instead relied only on the application's self-reported version
number.");
  # https://security-tracker.debian.org/tracker/source-package/lemonldap-ng
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9f8cb51e");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-95811");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/lemonldap-ng");
  script_set_attribute(attribute:"solution", value:
"Upgrade the lemonldap-ng packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-95811");

  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:"2026/09/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lemonldap-ng");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lemonldap-ng-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lemonldap-ng-fastcgi-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lemonldap-ng-handler");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lemonldap-ng-uwsgi-app");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-common-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-handler-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-manager-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-portal-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblemonldap-ng-ssoaas-apache-client-perl");
  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': 'lemonldap-ng', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'lemonldap-ng-doc', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'lemonldap-ng-fastcgi-server', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'lemonldap-ng-handler', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'lemonldap-ng-uwsgi-app', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'liblemonldap-ng-common-perl', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'liblemonldap-ng-handler-perl', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'liblemonldap-ng-manager-perl', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'liblemonldap-ng-portal-perl', 'reference': '2.16.1+ds-deb12u10'},
    {'release': '12.0', 'prefix': 'liblemonldap-ng-ssoaas-apache-client-perl', 'reference': '2.16.1+ds-deb12u10'}
];

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, 'lemonldap-ng / lemonldap-ng-doc / lemonldap-ng-fastcgi-server / etc');
}