Advisory Details

February 11th, 2013

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

ZDI-13-018
ZDI-CAN-1188

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
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.
ADDITIONAL DETAILS Citrix has issued an update to correct this vulnerability. More details can be found at:
http://support.citrix.com/article/CTX130846
DISCLOSURE TIMELINE
  • 2011-04-01 - Vulnerability reported to vendor
  • 2013-02-11 - Coordinated public release of advisory
CREDIT AbdulAziz Hariri of ThirdEyeTesters
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