A vulnerability was found in Citrix MetaFrame 1.0/1.8 (Connectivity Software) and classified as critical. This issue affects some unknown processing of the component ICA Protocol Handler. The manipulation with an unknown input leads to a missing encryption vulnerability. Using CWE to declare the problem leads to CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Citrix ICA (Independent Computing Architecture) protocol uses weak encryption (XOR) for user authentication.

The weakness was presented 03/29/2000 by Dug Song (Website). The advisory is shared at securityfocus.com. The identification of this vulnerability is CVE-2000-0244. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/23/2024). MITRE ATT&CK project uses the attack technique T1600 for this issue. Due to its background and reception, this vulnerability has a historic impact.

A public exploit has been developed in ANSI C. The exploit is available at securityfocus.com. It is declared as proof-of-concept.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (19821) and SecurityFocus (BID 1077†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Connectivity Software

Vendor

• Citrix

Name

• MetaFrame

Version

• 1.0
• 1.8

License

• commercial

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