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nessusThis script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.CISCO-SA-WEBEX-DLL-INJECT-XNMCSGTU_WEBEX-TEAMS.NASL
HistoryJun 17, 2021 - 12:00 a.m.

Cisco Webex Teams for Windows DLL Injection (cisco-sa-webex-dll-inject-XNmcSGTU)

2021-06-1700:00:00
This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
113

6.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

30.3%

According to its self-reported version, Cisco Webex Teams for Windows is affected by an dll injection vulnerability due to incorrect handling of directory paths at run time. An authenticated, local attacker can exploit this, by inserting a configuration file in a specific path in the system, to execute arbitrary code with the privileges of another user account.

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

Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');

include('compat.inc');

if (description)
{
  script_id(150848);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/06/21");

  script_cve_id("CVE-2021-1536");
  script_xref(name:"IAVA", value:"2021-A-0282");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvw48667");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvw79311");
  script_xref(name:"CISCO-BUG-ID", value:"CSCvw79321");
  script_xref(name:"CISCO-SA", value:"cisco-sa-webex-dll-inject-XNmcSGTU");

  script_name(english:"Cisco Webex Teams for Windows DLL Injection (cisco-sa-webex-dll-inject-XNmcSGTU)");

  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 Teams for Windows is affected by an dll injection vulnerability 
due to incorrect handling of directory paths at run time. An authenticated, local attacker can exploit this, by 
inserting a configuration file in a specific path in the system, to execute arbitrary code with the privileges of 
another user account.

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

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191120-webex-teams-dll
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b4213ada");
  script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq87642");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-1536");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(427);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/06/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/17");

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

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

  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_webex_teams_installed_win.nbin");
  script_require_keys("SMB/Registry/Enumerated", "installed_sw/Webex Teams");

  exit(0);
}

include('vcf.inc');

var app = 'Webex Teams';

var app_info = vcf::get_app_info(app:app, win_local:TRUE);
vcf::check_granularity(app_info:app_info, sig_segments:3);

var constraints = [
     {'min_version': '0.0',  'fixed_version' :'41.3.0.18986' },
     {'min_version': '41.4',  'fixed_version' : '41.4.0.18737' },
     {'min_version': '41.5',  'fixed_version' : '41.5.0.18815' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);
VendorProductVersionCPE
ciscowebex_teamscpe:/a:cisco:webex_teams

6.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

30.3%

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