Cisco WebEx for Internet Explorer RCE (cisco-sa-20170124-webex)

High Nessus Plugin ID 96908


A browser extension installed on the remote host is affected by a remote code execution vulnerability.


The Cisco WebEx Extension for Internet Explorer installed on the remote host is affected by a remote code execution vulnerability due to a crafted pattern that permits any URL utilizing it to automatically use native messaging to access sensitive functionality provided by the extension. An unauthenticated, remote attacker can exploit this vulnerability to execute arbitrary code by convincing a user to visit a web page that contains this pattern and starting a WebEx session.


Upgrade to Cisco WebEx Extension version or later.

See Also

Plugin Details

Severity: High

ID: 96908

File Name: cisco_webex_extension_rce_ie.nasl

Version: $Revision: 1.7 $

Type: local

Agent: windows

Family: Windows

Published: 2017/01/31

Modified: 2017/09/27

Dependencies: 13855

Risk Information

Risk Factor: High


Base Score: 9.3

Temporal Score: 7.7

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND


Base Score: 8.8

Temporal Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:X

Vulnerability Information

CPE: cpe:/a:microsoft:ie, cpe:/a:cisco:webex

Required KB Items: SMB/Registry/Enumerated

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/01/28

Vulnerability Publication Date: 2017/01/23

Exploitable With

Metasploit (Cisco WebEx Chrome Extension RCE (CVE-2017-3823))

Reference Information

CVE: CVE-2017-3823

BID: 95737

OSVDB: 150755

CISCO-SA: cisco-sa-20170124-webex

CISCO-BUG-ID: CSCvc86959, CSCvc88194, CSCvc88535

CERT: 909240