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ZDI-12-008 : Citrix Provisioning Services streamprocess.exe vDisk Name
Parsing Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-008
January 10, 2012

- -- CVE ID:


- -- CVSS:
10, 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.

- -- Vendor Response:

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

2012-01-10 - Coordinated public release of advisory



- -- Credit:
This vulnerability was discovered by:

* AbdulAziz Hariri of ThirdEyeTesters



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