Executive Summary

This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Title Cisco Webex Meetings Desktop App Update Service Command Injection Vulnerability
Name cisco-sa-20181024-webex-injection First vendor Publication 2018-10-24
Vendor Cisco Last vendor Modification 2018-10-24
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


A vulnerability in the update service of Cisco Webex Meetings Desktop App for Windows could allow an authenticated, local attacker to execute arbitrary commands as a privileged user.

The vulnerability is due to insufficient validation of user-supplied parameters. An attacker could exploit this vulnerability by invoking the update service command with a crafted argument. An exploit could allow the attacker to run arbitrary commands with SYSTEM user privileges.

While the CVSS Attack Vector metric denotes the requirement for an attacker to have local access, administrators should be aware that in Active Directory deployments, the vulnerability could be exploited remotely by leveraging the operating system remote management tools.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

After an additional attack method was reported to Cisco, the previous fix for this vulnerability was determined to be insufficient. A new fix was developed, and the advisory was updated on November 27, 2018, to reflect which software releases include the complete fix.

This advisory is available at the following link:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181024-webex-injection ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181024-webex-injection"]


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Original Source

Url : http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco (...)

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-78 Improper Sanitization of Special Elements used in an OS Command ('OS Command Injection') (CWE/SANS Top 25)

CPE : Common Platform Enumeration

Application 1
Application 2

Snort® IPS/IDS

Date Description
2018-11-27 Cisco WebEx WebExService.exe remote code execution attempt
RuleID : 48241 - Revision : 1 - Type : NETBIOS

Nessus® Vulnerability Scanner

Date Description
2018-12-27 Name : The remote host contains an application affected by a command injection vulne...
File : cisco_webex_meetings_win_33_6_4.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2019-01-28 17:21:18
  • Multiple Updates
2018-11-27 17:19:21
  • Multiple Updates
2018-10-25 00:22:14
  • Multiple Updates
2018-10-24 21:18:51
  • First insertion