UnratedFix available
tor — security advisory
Tor before 0.2.2.34, when configured as a bridge, uses direct DirPort access instead of a Tor TLS connection for a directory fetch, which makes it easier for remote attackers to enumerate bridges by observing DirPort connections.
- Products
- tor
- Affected versions
- Not specified
- Fixed versions
- 0.2.2.34-1
- CVEs
- CVE-2011-4894
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 22:37 UTC · Revision 1
Source evidence
Tor before 0.2.2.34, when configured as a bridge, uses direct DirPort access instead of a Tor TLS connection for a directory fetch, which makes it easier for remote attackers to enumerate bridges by observing DirPort connections.
osv:DEBIAN-CVE-2011-4894
tor
Fixed versions: 0.2.2.34-1
tor
Fixed versions: 0.2.2.34-1
tor
Fixed versions: 0.2.2.34-1
Complete source record
{
"id": "b9974ab86262de20a9ca6c43bdafe0f9abb0b8a98bbf22318447930f96dcf247",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2011-4894",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2011-4894",
"summary": "Tor before 0.2.2.34, when configured as a bridge, uses direct DirPort access instead of a Tor TLS connection for a directory fetch, which makes it easier for remote attackers to enumerate bridges by observing DirPort connections.",
"evidence": "osv:DEBIAN-CVE-2011-4894",
"products": [
{
"name": {
"value": "tor",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.2.2.34-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tor",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.2.2.34-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tor",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.2.2.34-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "DEBIAN-CVE-2011-4894",
"aliases": [
"DEBIAN-CVE-2011-4894"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.2.2.34-1"
}
]
}
],
"package": {
"name": "tor",
"purl": "pkg:deb/debian/tor?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-4894.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.2.2.34-1"
}
]
}
],
"package": {
"name": "tor",
"purl": "pkg:deb/debian/tor?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-4894.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.2.2.34-1"
}
]
}
],
"package": {
"name": "tor",
"purl": "pkg:deb/debian/tor?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2011-4894.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-23T17:47:25.609607976Z",
"provider": "osv",
"upstream": [
"CVE-2011-4894"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2011-4894"
]
},
"related_cves": [
{
"value": "CVE-2011-4894",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 416868,
"published_at": "2011-12-23T03:59:22.067+00:00"
}