January 25, 2017

Threat Advisory: Key Vulnerability Found In Cisco’s WebEx Chrome Extension

A critical vulnerability has recently been uncovered in the Chrome extension of Cisco WebEx, a web conferencing software widely used by enterprise businesses, leaving 20 million users susceptible to attack.

Windows Chrome users are in danger of getting hacked if unknowingly visiting a malicious website. The malicious websites host a file or other resource that contains the string “cwcsf-nativemsg-iframe-43c85c0d-d633-af5e-c056-32dc7efc570b.html” in the URL. This string is how the WebEx service remotely starts a meeting on visiting computers that have the Chrome extension installed. The string may then begin a WebEx session, or allow an attacker to execute malicious code. 

Although Cisco has released a timely update (v 1.0.5) to resolve the security flaw, the new version may still allow code-execution exploits. Herjavec Group recommends uninstalling the Chrome extension completely and using the standard temporary application to start and run WebEx meetings until Cisco releases a patched update. It’s unknown whether the flaw is present in Safari and Internet Explorer browsers, however, Firefox has blocked the extension until a final fix is available.

For more information please connect with a Herjavec Group security specialist today.  

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Original Report


About Herjavec Group

Dynamic IT entrepreneur Robert Herjavec founded Herjavec Group in 2003 to provide cybersecurity products and services to enterprise organizations. Herjavec Group delivers SOC 2 Type 2 certified managed security services supported by state-of-the-art, PCI compliant, Security Operations Centers, operated 24/7/365 by certified security professionals. This expertise is coupled with leadership positions across a wide range of functions including consulting, professional services & incident response. Herjavec Group has offices globally including across Canada, the United States, and the United Kingdom. For more information, visit www.herjavecgroup.com.

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