TippingPoint Zero Day Initiative

Cisco WebEx Player ARF String Parsing Remote Code Execution Vulnerability

ZDI-10-155: August 23rd, 2010

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9936. For further product information on the TippingPoint IPS:

Vulnerability Details

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

The specific flaw exists during the parsing of strings defined within the ARF file format. Strings are typically prefixed by their valid length. By supplying a string much longer than the defined length a heap overflow will occur which can be further leveraged to execute arbitrary code under the context of the current user.

Vendor Response

Cisco states:

This issue has been resolved in T27FR14, deployed to WebEx customers in April.

Disclosure Timeline

    2010-01-06 - Vulnerability reported to vendor
    2010-08-23 - Coordinated public release of advisory


This vulnerability was discovered by:
    Gabriel Menezes Nunes