Advisory Details

January 20th, 2011

Citrix Provisioning Services streamprocess.exe Remote Code Execution Vulnerability

ZDI-11-023
ZDI-CAN-746

CVE ID
CVSS SCORE 10.0, AV:N/AC:L/Au:N/C:C/I:C/A:C
AFFECTED VENDORS Citrix
AFFECTED PRODUCTS Citrix Provisioning Services
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['10781']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
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 by default on UDP port 6095. When handling a packet of type 0x40020010 the process blindly copies user supplied data into a fixed length buffer on the stack. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the SYSTEM user.

ADDITIONAL DETAILS Citrix has issued an update to correct this vulnerability. More details can be found at:
http://support.citrix.com/article/CTX127149
DISCLOSURE TIMELINE
  • 2010-06-09 - Vulnerability reported to vendor
  • 2011-01-20 - Coordinated public release of advisory
CREDIT AbdulAziz Hariri
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