ZDI-11-111: (0Day) Hewlett-Packard Virtual SAN Appliance hydra.exe Login Request Remote Code Execution Vulnerability
March 23, 2011
-- CVSS: 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
-- Affected Vendors: Hewlett-Packard
-- Affected Products: Hewlett-Packard Virtual SAN Appliance
-- Vulnerability Details: This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Hewlett-Packard Virtual SAN appliance. Authentication is not required to exploit this vulnerability.
The flaw exists within the hydra.exe component which listens by default on port 13838. When parsing a login request the Hydra daemon will call sscanf() using fixed-length stack buffers and no length checks. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the SYSTEM service.
-- Vendor Response: March 23, 2011 - This vulnerability is being disclosed publicly without a patch in accordance with the ZDI 180 day deadline.
-- Mitigations: This vulnerability could be mitigated by administrators by restricting communication with the hydra agent to known client IP addresses.
-- Disclosure Timeline: 2010-09-24 - Vulnerability reported to vendor 2011-03-23 - Public release of advisory
-- Credit: This vulnerability was discovered by: * Nicolas Gregoire of Agarri (www.agarri.fr)
-- 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:
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:
Follow the ZDI on Twitter: