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ZDI-12-009 : Citrix Provisioning Services Stream Service 0x40020000
Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-009
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 Citrix Provisioning Services



- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11860.
For further product information on the TippingPoint IPS, visit:

    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 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 Response:

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

http://support.citrix.com/article/CTX130846




- -- Disclosure Timeline:
2011-07-22 - Vulnerability reported to vendor

2012-01-10 - Coordinated public release of advisory



- -- Credit:
This vulnerability was discovered by:

* Aniway.Anyway@gmail.com



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