Tenable Security Center < 6.9.0 Multiple Vulnerabilities (TNS-2026-22)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(339129);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/28");

  script_cve_id(
    "CVE-2026-3784",
    "CVE-2026-4873",
    "CVE-2026-5545",
    "CVE-2026-5773",
    "CVE-2026-11564",
    "CVE-2026-11586",
    "CVE-2026-11856",
    "CVE-2026-12064",
    "CVE-2026-19626",
    "CVE-2026-19628",
    "CVE-2026-19629",
    "CVE-2026-19631",
    "CVE-2026-19635",
    "CVE-2026-19636",
    "CVE-2026-19639",
    "CVE-2026-19679",
    "CVE-2026-19680",
    "CVE-2026-19681",
    "CVE-2026-19682",
    "CVE-2026-27601"
  );
  script_xref(name:"IAVA", value:"2026-A-0901");

  script_name(english:"Tenable Security Center < 6.9.0 Multiple Vulnerabilities (TNS-2026-22)");

  script_set_attribute(attribute:"synopsis", value:
"An instance of Security Center installed on the remote system is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Tenable Security Center running on the remote host is prior to 6.9.0. It is,
therefore, affected by multiple vulnerabilities as referenced in the TNS-2026-22 advisory.

  - libcurl might in some circumstances reuse the wrong connection for SMB(S) transfers. libcurl features a
    pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead.
    When reusing a connection a range of criteria must be met. Due to a logical error in the code, a network
    transfer operation that was requested by an application could wrongfully reuse an existing SMB connection
    to the same server that was using a different 'share' than the new subsequent transfer should. This could
    in unlucky situations lead to the download of the wrong file or the upload of a file to the wrong place.
    When this happens, the same credentials are used and the server name is the same. (CVE-2026-5773)

  - libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of
    them matches the setup. An easy handle that first uses default native CA trust can continue trusting the
    native platform store after the application switches that same handle to custom CA material for a later
    transfer. (CVE-2026-11564)

  - A command injection vulnerability exists in Security Center where a remote, unauthenticated attacker 
    could exploit this issue to execute arbitrary commands on the underlying operating system with the 
    privileges of the service account. (CVE-2026-19682)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://docs.tenable.com/release-notes/Content/security-center/2026.htm
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d5587a0b");
  script_set_attribute(attribute:"see_also", value:"https://www.tenable.com/security/TNS-2026-22");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Tenable Security Center 6.9.0 or later.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/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:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/U:Clear");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-19682");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-5773");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Tenable Security Center SCAP Audit File Command Injection');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"vendor_severity", value:"Critical");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/24");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:tenable:security_center");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("securitycenter_installed.nbin", "securitycenter_detect.nbin");
  script_require_ports("installed_sw/SecurityCenter");

  exit(0);
}

include('vcf.inc');
include('vcf_extras.inc');

var app_info = vcf::tenable_sc::get_app_info();

var constraints = [
  { 'max_version' : '6.8.0', 'fixed_display' : 'Upgrade to 6.9.0 or later' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_HOLE
);