ZDI-10-155: Cisco WebEx Player ARF String Parsing Remote Code Execution Vulnerability

ZDI-10-155: Cisco WebEx Player ARF String Parsing Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-155
August 23, 2010

– CVSS:
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)

– Affected Vendors:
Cisco

– Affected Products:
Cisco WebEx

– TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9936.
For further product information on the TippingPoint IPS, visit:

http://www.tippingpoint.com

– 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

– Credit:
This vulnerability was discovered by:
* Gabriel Menezes Nunes

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