Cisco Webex Meetings Desktop App for Windows Arbitrary File Overwrite (cisco-sa-webex-desktop-app-OVSfpVMj)

2020-08-25T00:00:00
ID CISCO-SA-WEBEX-DESKTOP-APP-OVSFPVMJ.NASL
Type nessus
Reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-08-25T00:00:00

Description

According to its self-reported version, Cisco Webex Meetings Desktop App for Windows is affected by a vulnerability due to improper validation of URL parameters that are sent from a website to the affected application. An unauthenticated, remote attacker can exploit this, by persuading a user to follow a URL to a website that is designed to submit crafted input to the affected application, in order to overwrite arbitrary files.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

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

include('compat.inc');

if (description)
{
  script_id(139799);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/11/06");

  script_cve_id("CVE-2020-3440");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvt80020");
  script_xref(name:"CISCO-SA", value:"cisco-sa-webex-desktop-app-OVSfpVMj");
  script_xref(name:"IAVA", value:"2020-A-0390-S");

  script_name(english:"Cisco Webex Meetings Desktop App for Windows Arbitrary File Overwrite (cisco-sa-webex-desktop-app-OVSfpVMj)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, Cisco Webex Meetings Desktop App for Windows is affected by a vulnerability due
to improper validation of URL parameters that are sent from a website to the affected application. An unauthenticated,
remote attacker can exploit this, by persuading a user to follow a URL to a website that is designed to submit crafted
input to the affected application, in order to overwrite arbitrary files.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-desktop-app-OVSfpVMj
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0fa98154");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt80020");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvt80020");
  script_set_attribute(attribute:"agent", value:"windows");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/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:N/UI:R/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-2020-3440");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(22);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/08/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/08/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/08/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:webex_meetings");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_webex_meetings_win_installed.nbin");
  script_require_keys("installed_sw/Cisco Webex Meetings");

  exit(0);
}

include('vcf.inc');

get_kb_item_or_exit('Host/local_checks_enabled');
app = 'Cisco Webex Meetings';

app_info = vcf::get_app_info(app:app, win_local:TRUE);

constraints = [
  { 'fixed_version' : '40.8'}
];

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