TippingPoint Digital Vaccine Laboratories
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McAfee SaaS myCIOScn.dll Scan Method Script Injection Remote Code Execution Vulnerability

TPTI-11-13: August 8th, 2011

CVE ID

Affected Vendors

    McAfee

Affected Products

    Security-as-a-Service

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11561. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of McAfee Security-as-a-Service. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaws exists within myCIOScn.dll. First, the MyCioScan.Scan.ReportFile parameter exposed via ActiveX can be set to any arbitrary filename including sensitive system files and directories. Secondly, the parameter to the MyCioScan.Scan.Start() method can be carefully crafted as to inject script constructs into the log file written at the end of the AV scan. The combination of these flaws can be leveraged by a remote attacker to execute arbitrary code under the context of the user running the browser.

Vendor Response

McAfee has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2011-01-24 - Vulnerability reported to vendor
    2011-08-08 - Coordinated public release of advisory

Credit

This vulnerability was discovered by: