Citrix Provisioning Services Stream Service 0x40020000 Remote Code Execution VulnerabilityZDI-12-009: January 10th, 2012
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11860. For further product information on the TippingPoint IPS:
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 flaw exists within the streamprocess.exe component. This process listens on UDP port 6905. When handling a request type 0x40020000 the process uses the user supplied length in an attempted bounds check before copying to a local stack buffer. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of SYSTEM.
Vendor ResponseCitrix has issued an update to correct this vulnerability. More details can be found at:
2011-07-22 - Vulnerability reported to vendor
2012-01-10 - Coordinated public release of advisory
CreditThis vulnerability was discovered by: