Security Advisory – May 4, 2013

Zscaler Protects Against Vulnerability in Internet Explorer That Could Allow Remote Code Execution

Zscaler, working with Microsoft through their MAPPs program has proactively deployed protections for the following web based, client-side vulnerability included in their latest out-of-band security update. This vulnerability is known to have been actively exploited in the wild. Zscaler will continue to monitor exploits associated with this issue and deploy additional protections as necessary.

Microsoft Security Advisory - 2847140 – Vulnerability in Internet Explorer Could Allow Remote Code Execution

Severity: Critical

Affected Software

  • Internet Explorer 8

CVE-2013-1347 – Remote Code Execution Vulnerability in Internet Explorer

Description: The vulnerability exists in the way that Internet Explorer accesses an object in memory that has been deleted or has not been properly allocated. The vulnerability may corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user within Internet Explorer. An attacker could host a specially crafted website that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the website.


About Zscaler

Zscaler ensures that more than 15 million employees at more than 5,000 enterprise and government organizations worldwide are protected against cyber attacks and data breaches while staying fully compliant with corporate and regulatory policies. Zscaler’s award-winning Security-as-a-Service platform delivers a safe and productive Internet experience for every user, from any device and from any location. Zscaler effectively moves security into the Internet backbone, operating in more than 100 data centers around the world and enabling organizations to fully leverage the promise of cloud and mobile computing with unparalleled and uncompromising protection and performance. Zscaler delivers unified, carrier-grade Internet security, advanced persistent threat (APT) protection, data loss prevention, SSL decryption, traffic shaping, policy management and threat intelligence–all without the need for on-premise hardware, appliances or software. To learn more, visit us at

Press Contacts:

Bill Bode
Highwire PR
415-963-4174 ext. 49

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