Samba 4.x < 4.9.15 / 4.10.x < 4.10.10 AD DC LDAP Server Denial of Service (CVE-2019-14847)

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(130629);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/15");

  script_cve_id("CVE-2019-14847");

  script_name(english:"Samba 4.x < 4.9.15 / 4.10.x < 4.10.10 AD DC LDAP Server Denial of Service (CVE-2019-14847)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Samba server is potentially affected by a denial of service vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Samba running on the remote host is 4.x prior to 4.9.15, or 4.10.x prior to 4.10.10. It is, therefore,
affected by a AD DC LDAP server denial of service vulnerability. An authenticated attacker with 'get changes'
permissions could use this flaw to crash the AD DC LDAP server via the 'dirsync' LDAP control.");
  # https://www.samba.org/samba/security/CVE-2019-14847.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2bb64953");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Samba version 4.9.15 / 4.10.10 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P");
  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:H/UI:N/S:U/C:N/I:N/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-2019-14847");

  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:"2019/10/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/08");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:samba:samba");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("smb_nativelanman.nasl");
  script_require_keys("SMB/NativeLanManager", "SMB/samba", "Settings/ParanoidReport");

  exit(0);
}

include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('vcf.inc');
include('vcf_extras.inc');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

app = vcf::samba::get_app_info();
vcf::check_granularity(app_info:app, sig_segments:3);

constraints = [
  {'min_version':'4.0', 'fixed_version':'4.9.15'},
  {'min_version':'4.10.0rc0', 'fixed_version':'4.10.10'}
];

vcf::check_version_and_report(app_info:app, constraints:constraints, severity:SECURITY_WARNING, strict:FALSE);