CVE-2014-5117

CVE-2014-5117 is a medium-severity vulnerability in Torproject Tor with a CVSS 2.0 base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2014-5117?
CVE-2014-5117 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2014-5117 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-5117?
CVE-2014-5117 primarily affects Torproject Tor. In total, 124 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-5117?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-5117 published?
CVE-2014-5117 was published on 2014-07-30 and last updated on 2026-06-17.

References

Affected products (124)

More vulnerabilities in Torproject Tor

All CVEs affecting Torproject Tor →