CVE-2000-0244: Weak Encryption
The Citrix ICA (Independent Computing Architecture) protocol uses weak encryption (XOR) for user authentication.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Remove
Remove
Citrix MetaFramefrom your environment.If ICA functionality is not required, uninstall or disable Citrix MetaFrame / ICA components until a vendor-provided fix or secure alternative is available.
- Compensating control
Restrict access to Citrix ICA services (MetaFrame) at the network perimeter and internal firewalls/ACLs so only trusted management networks or known IP addresses can reach ICA ports; do not expose ICA directly to the Internet.
- Compensating control
Place ICA traffic behind a VPN or secure gateway that provides strong, modern encryption and mutual authentication; require clients to connect through that protected channel rather than directly to the MetaFrame servers.
- Operational
Treat any credentials that may have been transmitted via ICA as potentially exposed; consider rotating administrative and user passwords and reviewing authentication logs for suspicious access.
Event History
Frequently Asked Questions
What is the severity of CVE-2000-0244?
CVE-2000-0244 has a moderate severity rating due to its weak encryption allowing potential unauthorized access.
How do I fix CVE-2000-0244?
To fix CVE-2000-0244, upgrade to a version of Citrix software that uses stronger encryption methods.
What versions of Citrix are affected by CVE-2000-0244?
CVE-2000-0244 affects Citrix MetaFrame versions 1.0 and up to 1.8, as well as Citrix WinFrame 3.5_1.8 for Windows NT.
What are the risks associated with CVE-2000-0244?
The risks of CVE-2000-0244 include potential interception of user credentials and unauthorized access to sensitive systems.
Is CVE-2000-0244 still a concern today?
While CVE-2000-0244 was reported over two decades ago, systems running vulnerable versions still pose security risks if not updated.