{"id":"CVE-2011-2768","url":"https://www.cyber-defence.io/tools/cve/CVE-2011-2768","generatedAt":"2026-10-27T17:58:00.780Z","title":"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…","description":"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.","published":"2011-12-23T03:59:22.000Z","lastModified":"2026-06-16T23:31:58.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":5.8,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N"},"cwe":["CWE-264"],"affected":["tor/tor"],"epss":{"score":0.00723,"percentile":0.53751,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.72%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.debian.org/security/2011/dsa-2331","source":"cve@mitre.org"},{"url":"https://blog.torproject.org/blog/tor-02234-released-security-patches","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.debian.org/security/2011/dsa-2331","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://blog.torproject.org/blog/tor-02234-released-security-patches","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2011-2768","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}