Access Restriction Bypass Affecting tor package, versions <0.2.2.34-1


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.72% (51st percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-TOR-19166155
  • published22 Aug 2026
  • disclosed23 Dec 2011

Introduced: 23 Dec 2011

CVE-2011-2768  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade Echo:latest tor to version 0.2.2.34-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tor package and not the tor package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS certificate chain as part of an outgoing OR connection, which allows remote relays to bypass intended anonymity properties by reading this chain and then determining the set of entry guards that the client or bridge had selected.

CVSS Base Scores

version 3.1