Cisco WebEx Extension for Chrome < 1.0.12 'atgpcext' Library GPC Sanitization RCE (cisco-sa-20170717-webex)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

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

Description :

The Cisco WebEx Extension for Chrome installed on the remote host is a
version prior to 1.0.12. It is, therefore, affected by a remote code
execution vulnerability in the 'atgpcext' library due to incomplete
GPC sanitization. An unauthenticated, remote attacker can exploit
this, by convincing a user to visit a specially crafted website, to
execute arbitrary code with the privileges of the affected browser.

See also :

http://www.nessus.org/u?0a976aaa
https://bugs.chromium.org/p/project-zero/issues/detail?id=1324
https://thehackernews.com/2017/07/cisco-webex-vulnerability.html

Solution :

Upgrade to Cisco WebEx Extension for Chrome version 1.0.12 or later.

Risk factor :

High / CVSS Base Score : 9.3
(CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.7
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Windows

Nessus Plugin ID: 101816 ()

Bugtraq ID: 99614

CVE ID: CVE-2017-6753

Ready to Amp Up Your Nessus Experience?

Get Nessus Professional to scan unlimited IPs, run compliance checks & more

Buy Nessus Professional Now