What’s Vulnerable › Vulnerabilities

CVE-2014-5117

• Severity: medium (CVSS 5.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2014-07-30 · updated 2026-06-17

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.

Affected products

• torproject Tor: through 0.2.4.22; 0.0.2, 0.0.2-pre13, 0.0.2-pre14, 0.0.2-pre15, 0.0.2-pre16, 0.0.2-pre17 (+117)

References

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

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