-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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 - -- About the Zero Day Initiative (ZDI): Established by TippingPoint, The Zero Day Initiative (ZDI) represents a best-of-breed model for rewarding security researchers for responsibly disclosing discovered vulnerabilities. Researchers interested in getting paid for their security research through the ZDI can find more information and sign-up at: http://www.zerodayinitiative.com The ZDI is unique in how the acquired vulnerability information is used. TippingPoint does not re-sell the vulnerability details or any exploit code. Instead, upon notifying the affected product vendor, TippingPoint provides its customers with zero day protection through its intrusion prevention technology. Explicit details regarding the specifics of the vulnerability are not exposed to any parties until an official vendor patch is publicly available. Furthermore, with the altruistic aim of helping to secure a broader user base, TippingPoint provides this vulnerability information confidentially to security vendors (including competitors) who have a vulnerability protection or mitigation product. Our vulnerability disclosure policy is available online at: http://www.zerodayinitiative.com/advisories/disclosure_policy/ Follow the ZDI on Twitter: http://twitter.com/thezdi -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) iQEcBAEBAgAGBQJPDHxaAAoJEFVtgMGTo1scjQwH/RXTmZGKOsOFcd+8F+nWENnY UQxvLB9DDSeLEg6vDhp/XFmKCyYLURXZ0Rdy+N6O3dlivih8qDKcLMgwxjpyQ8jh K4yVPU+sq0AF11hl7vhGExlm0spC/2CwMVo3uOn9RRgDLib3dMZmYGRZRmTMfrhN 0qHoHSz1A3iSc7ypXBEnM+e/Cx1gRVgHhL0b9xEHOZo6v2xS4/kCpqHdzx/A+K1g xBT5Eyi+wKbgG8eEk4oKS3vjK5fnLyO+ASvwZlrYg5govBdLNlxEQ+mMWJcSQFJi oBf0i1YPLUmTUZ7PlZTDqpXEKXhQXUCIPv25/wg3wNTA3F82zzccDBqHSKoWkd8= =J/Jk -----END PGP SIGNATURE-----
