{"id":"CVE-2011-2768","aliases":["DEBIAN-CVE-2011-2768","DSA-2331-1","EUVD-2011-2742","GHSA-h978-fv3x-h43g","openSUSE-SU-2024:10423-1"],"status":"published","title":"Tor before 0.2.2.34, when configured as a client or bridge, sends a TLS certificate chain as part...","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.","severity":{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00723,"percentile":0.54297,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-264"],"published":"2011-10-28T00:00:00Z","modified":"2026-10-23T17:47:46Z","fixes":[{"ecosystem":"Debian:12","package":"tor","fixed_in":["0.2.2.34-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"tor","fixed_in":["0.2.2.34-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"tor","fixed_in":["0.2.2.34-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.2.34-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.2.34-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.2.34-1"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.1.31-1"}]}],"versions":["0.2.1.29-1","0.2.1.30-1","0.2.1.31-1~lenny+1"],"bundled":2},{"source":"osv","ecosystem":"Debian:5.0","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.1.31-1~lenny+1"}]}],"versions":["0.2.0.33-1","0.2.0.34-1","0.2.0.34-1~bpo40+1","0.2.0.35-1","0.2.0.35-1~lenny1","0.2.0.35-1~lenny2","0.2.1.10-alpha-1","0.2.1.11-alpha-1","0.2.1.12-alpha-1","0.2.1.13-alpha-1","0.2.1.14-rc-1","0.2.1.15-rc-1","0.2.1.16-rc-1","0.2.1.17-rc-1","0.2.1.18-1","0.2.1.19-1","0.2.1.2-alpha-1","0.2.1.20-1","0.2.1.20-2","0.2.1.21-1","0.2.1.21-1~bpo50+1","0.2.1.22-1","0.2.1.22-1~bpo50+1","0.2.1.23-1","0.2.1.23-2","0.2.1.25-1","0.2.1.25-1~bpo50+1","0.2.1.25-2","0.2.1.25-3","0.2.1.26-1","0.2.1.26-1~bpo50+1","0.2.1.26-1~lenny+1","0.2.1.26-1~lenny+2","0.2.1.26-1~lenny+4","0.2.1.26-1~lennyvolatile1","0.2.1.26-1~lennyvolatile2","0.2.1.26-2","0.2.1.26-3","0.2.1.26-4","0.2.1.26-4~bpo50+1","0.2.1.26-5","0.2.1.26-6","0.2.1.26-6~bpo50+1","0.2.1.29-1","0.2.1.29-1~lenny+1","0.2.1.30-1","0.2.1.4-alpha-1","0.2.1.5-alpha-1","0.2.1.6-alpha-1","0.2.1.7-alpha-1","0.2.1.7-alpha-2","0.2.1.8-alpha-1","0.2.1.9-alpha-1"],"bundled":2},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"tor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.8.11-1.1"}]}],"bundled":22}],"products":[{"vendor":"tor","product":"tor"}],"references":[{"url":"https://blog.torproject.org/blog/tor-02234-released-security-patches","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","advisory","fix"]},{"url":"http://www.debian.org/security/2011/dsa-2331","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2768"},{"url":"https://github.com/advisories/GHSA-h978-fv3x-h43g"},{"url":"https://security-tracker.debian.org/tracker/CVE-2011-2768","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2011-0427","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-2768","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-2769","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-2778","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-4576","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-4894","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-4895","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-4896","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2011-4897","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3517","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3518","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-3519","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-4419","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-4922","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-5573","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-7295","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0160","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-5117","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-2688","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-2689","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-2928","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-2929","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2011-2768","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.","status":"published","published":"2011-12-23T02:00:00Z","modified":"2024-08-06T23:15:30.714Z","updated_at":"2026-11-02T14:35:36.968002Z"}],"euvd":[{"id":"EUVD-2011-2742","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.","status":"published","published":"2011-12-23T02:00:00Z","modified":"2024-08-06T23:15:30Z","updated_at":"2026-11-03T01:39:54.68331Z"}],"ghsa":[{"id":"GHSA-h978-fv3x-h43g","title":"Tor before 0.2.2.34, when 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selected.","status":"published","published":"2011-12-23T03:59:21.957Z","modified":"2026-06-16T23:31:57.953Z","cvss":[{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-264"],"updated_at":"2026-11-02T14:02:11.800512Z"}],"osv":[{"id":"CVE-2011-2768","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.","status":"published","published":"2011-12-23T03:59:21Z","modified":"2026-04-10T03:41:53.004551Z","updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2011-2768","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.","status":"published","published":"2011-12-23T03:59:21.957Z","modified":"2026-10-23T17:47:46.96770947Z","updated_at":"2026-11-02T15:45:24.612044Z"},{"id":"DSA-2331-1","title":"tor - several","status":"published","published":"2011-10-28T00:00:00Z","modified":"2026-03-09T01:18:28.830157Z","updated_at":"2026-11-02T15:46:15.108335Z"},{"id":"openSUSE-SU-2024:10423-1","title":"tor-0.2.8.11-1.1 on GA media","description":"These are all security issues fixed in the tor-0.2.8.11-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:22:58.106216Z","updated_at":"2026-11-02T16:58:34.487567Z"}]}}