TippingPoint Zero Day Initiative
 

Citrix Provisioning Services streamprocess.exe vDisk Name Parsing Remote Code Execution Vulnerability

ZDI-12-008: January 10th, 2012

CVSS Score

Affected Vendors

Affected Products

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Citrix Provisioning Services. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the streamprocess.exe component which listens for UDP traffic on multiple ports, beginning with 6905. When handling a packet which requests a vDisk name, the user-supplied length value is not properly validated. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the SYSTEM user.

Vendor Response

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

Disclosure Timeline

    2011-04-01 - Vulnerability reported to vendor
    2012-01-10 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    AbdulAziz Hariri of ThirdEyeTesters