CVE-2011-4895
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different...
CVE-2011-4895 is a medium vulnerability (CVSS 4.3) in Tor, published December 23, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.53%, the 75th percentile. Fixed in tor 0.2.2.34-1.
- Severity
- 4.3 MediumCVSS 2.0, NVD
- Exploit chance
- 1.53%EPSS, 75th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
0.2.2.34-1tor +3 more
Description
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different from the process used by a client, which makes it easier for remote attackers to enumerate bridges by observing circuit building.
Exploit likelihood
Affected products
Affected packages
What each source reports
NVD Score used
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different from the process used by a client, which makes it easier for remote attackers to enumerate bridges by observing circuit building.
- Record
CVE-2011-4895- CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
CVE ListNo score
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different from the process used by a client, which makes it easier for remote attackers to enumerate bridges by observing circuit building.
- Record
CVE-2011-4895- Updated
- 2026-11-02
EUVDEUVD-2011-4812No score
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different from the process used by a client, which makes it easier for remote attackers to enumerate bridges by observing circuit building.
- Record
EUVD-2011-4812- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vv8x-qxvx-9wjxNo score
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different...
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different from the process used by a client, which makes it easier for remote attackers to enumerate bridges by observing circuit building.
- Record
GHSA-vv8x-qxvx-9wjx- Weakness
- CWE-200
- Updated
- 2026-11-02
OSVNo score
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different from the process used by a client, which makes it easier for remote attackers to enumerate bridges by observing circuit building.
- Record
CVE-2011-4895- Updated
- 2026-11-02
OSVDEBIAN-CVE-2011-4895No score
Tor before 0.2.2.34, when configured as a bridge, sets up circuits through a process different from the process used by a client, which makes it easier for remote attackers to enumerate bridges by observing circuit building.
- Record
DEBIAN-CVE-2011-4895- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10423-1No score
tor-0.2.8.11-1.1 on GA media
These are all security issues fixed in the tor-0.2.8.11-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10423-1- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
blog.torproject.org/blog/tor-02234-released-security-patches
nvd.nist.gov/vuln/detail/CVE-2011-4895
github.com/advisories/GHSA-vv8x-qxvx-9wjx
security-tracker.debian.org/tracker/CVE-2011-4895
suse.com/security/cve/CVE-2011-0427
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