CVE-2008-3253

Vulnerability

The XenAPI HTTP interfaces in Citrix XenServer Express, Standard, and Enterprise Edition 4.1.0, Citrix XenServer Dell Edition (Express and Enterprise) 4.1.0, and HP integrated Citrix XenServer (Select and Enterprise) 4.1.0 are vulnerable to cross-site scripting (XSS). The vulnerability is present in the HTTP management interfaces and can be triggered via unspecified vectors, allowing injection of arbitrary web script or HTML.

Exploitation

An attacker can exploit this vulnerability by sending specially crafted input to the XenAPI HTTP interfaces. The attack requires no authentication or special network position beyond the ability to reach the HTTP management interface. The attacker's input is then reflected or stored and executed in the context of the victim's browser when they access the affected interface.

Impact

Successful exploitation allows the attacker to execute arbitrary web script or HTML in the context of the affected XenServer management interface. This can lead to session hijacking, defacement, or theft of sensitive credentials, depending on the privileges of the victim user accessing the interface.

Mitigation

Citrix has acknowledged the vulnerability but the available reference [1] does not provide a specific patch version or release date for a fix. Organizations should restrict network access to the XenAPI HTTP interfaces to trusted users and networks as a temporary workaround. If no vendor update is available, consider disabling the HTTP management interface if not required.